This document contains 41 patent applications related to earth-boring tools and cutting elements. Many of the applications list Cornelis Roelof Jonker as an inventor and were assigned to companies including Baker Hughes Incorporated, Element Six Abrasives S.A., and Element Six Limited. The applications involve cutting inserts, pick tools, drill tips, and methods for making superhard materials to be used in earth-boring tools.

1. TITLE Country Publication Date
International Class Application No Applicant Inventor
1. 20160130882 CUTTING ELEMENTS FOR EARTH-BORING TOOLS,
EARTH-BORING TOOLS INCLUDING SUCHCUTTING ELEMENTS, AND
RELATED METHODS
US 12.05.2016
E21B 10/567 14980653
Baker Hughes
Incorporated
Anthony A. DIGIOVANNI ; Yavuz KADIOGLU; Danny E. SCOTT;
Matthew J. MEINERS; Rudolf Carl PESSIER; Nicholas J. LYONS;
Clement D. VAN DER RIET; Donald Royceton HERSCHELL;
Cornelis Roelof JONKER; Roger William NILEN; Gerard Peter
DOLAN
2. PI0919645 INSERTO PARA UMA FERRAMENTA DE ATAQUE, E MÉTODOS
PARA FABRICAR UM INSERTO E PARA USAR UM INSERTO PARA DEGRADAR
OU QUEBRAR CORPOS,ARTIGOS OU FORMAÇÕES
BR 08.12.2015
E21B 10 PI0919645
Baker Hughes
Incorporated
Anthony Albert DIGIOVANNI, Cornelis Roelof JONKER, Roger
William Nigel NILEN
3. 2014014175 ELEMENTOS DE CORTE PARA HERRAMIENTAS DE
PERFORACION TERRESTRE, HERRAMIENTAS DE PERFORACION TERRESTRE
QUE INCLUYENTALES ELEMENTOS DE CORTE, Y METODOS RELACIONADOS.
MX 23.07.2015
E21B 10/46 2014014175
Baker Hughes
Incorporated
Anthony A. DIGIOVANNI, Nicholas J. LYONS, Danny E. SCOTT,
Rudolf Carl PESSIER, Yavuz KADIOGLU, Matthew J. MEINER,
Clement D. VAN DER REIT, Donald Royceton HERSCHELL,
Cornelis Roelof JONKER, Roger William Nigel NILEN
4. 20150151362 CUTTING INSERTS AND METHOD FOR MAKING SAME US 04.06.2015
B22F 7/06 14409750
Element Six Abrasives
S.A.
Bo ChristerOLOFSSON,CornelisRoelof JONKER, Roger William
Nigel NILEN, Stig Ake ANDERSIN, John James BARRY
5. 2864070 CUTTING INSERTS AND METHOD FOR MAKING SAME EP 29.04.2015
B22F 3/14 13731095
Element Six Abrasives
SA
OLOFSSON Bo Christer, JONKER Cornelis Roelof, NILEN Roger
William Nigel, ANDERSIN Stig Åke, BARRY John James

2. 6. 2852731 CUTTING ELEMENTS FOR EARTH-BORING TOOLS,
EARTH-BORING TOOLS INCLUDING SUCHCUTTING ELEMENTS, AND
RELATED METHODS
EP 01.04.2015
E21B 10/46 13794471 Baker Hughes Inc
DIGIOVANNI Anthony A; KADIOGLU Yavuz; SCOTT Danny E; MEINER
Matthew J; PESSIER Rudolf Carl; LYONS Nicholas J; VAN DER RIET
Clement D; HERSCHELL Donald Royceton; JONKER Cornelis Roelof;
NILEN Roger William Nigel; DOLAN Gerard Peter
7. 20150041225 POLYCRYSTALLINE SUPERHARD MATERIAL AND
METHOD FOR MAKING SAME
US 12.02.2015
E21B 10/56 14387216
Element Six Abrasives
S.A.
JONKER Cornelis Roelof; NILEN Roger William Nigel; KASONDE
Maweja; ANDERSIN Stig Åke
8. 20150035342 PICK TOOL AND ASSEMBLY COMPRISING SAME US 05.02.2015
E21C 35/18 14372761
Element Six Abrasives
S.A.
Cornelis Roelof JONKER; Robert FRIES; Frank Friedrich LACHMANN;
Bernd Heinrich RIES
9. 11201407588P CUTTING ELEMENTS FOR EARTH-BORING TOOLS,
EARTH-BORING TOOLS INCLUDING SUCHCUTTING ELEMENTS, AND
RELATED METHODS
SG 29.01.2015
E21B 10/46 11201407588P
Baker Hughes
Incorporated
DIGIOVANNI, Anthony, A.; KADIOGLU, Yavuz; SCOTT, Danny, E.;
MEINER, Matthew,J.; PESSIER,Rudolf,Carl;LYONS, Nicholas, J.; VAN
DER RIET, Clement, D.; HERSCHELL, Donald, Royceton; JONKER,
Cornelis, Roelof; NILEN, Roger, William, Nigel; DOLAN, Gerard,
Peter
10. 2812532 PICK TOOL AND ASSEMBLY COMPRISING SAME EP 17.12.2014
E21C 35/183 13701224 ElementSix Abrasives SA
JONKERCornelisRoelof;FRIESRobert; LACHMANN Frank Friedrich;
RIES Bernd Heinrich
11. 20140361601 SUPER-HARD TIP FOR A PICK TOOL AND PICK TOOL
COMPRISING SAME
US 11.12.2014
E21C 35/183 14366211
Element Six Abrasives
S.A.
Peter BUSH; Bernd Heinrich RIES; Robert FRIES; Cornelis Roelof
JONKER

3. 12. 2795062 SUPER-HARD TIP FOR A PICK TOOL AND PICK TOOL COMPRISING SAME EP 29.10.2014
E21C 35/18 12806421 ELEMENT SIX ABRASIVES SA
BUSH Peter; RIES Bernd Heinrich; FRIES Robert;
JONKER Cornelis Roelof
13. 20140265530 TIP FOR A PICK TOOL, METHOD OF MAKING SAME AND PICK TOOL
COMPRISING SAME
US 18.09.2014
E21C 35/183 14351053 ELEMENT SIX ABRASIVES S.A. FRIES Robert; JONKER Cornelis Roelof
14. 20140186132 TWIST DRILL TIPS, PRECURSOR CONSTRUCTIONS FOR USE IN MAKING
SAME, AND METHODS FOR MAKING AND USING SAME
US 03.07.2014
B23B 51/02 14119748 Element Six Limited
KASONDE Maweja; FRIES Robert; BARRY John
James; JONKER Cornelis Roelof
15. 2737176 TIPS FOR PICK TOOLS AND PICK TOOLS COMPRISING SAME EP 04.06.2014
E21C 35/183 12741310 ELEMENT SIX ABRASIVES SA SANAN Matthew Alan; JONKER Cornelis Roelof
16. 20140139008 TIPS FOR PICK TOOLS AND PICK TOOLS COMPRISING SAME US 22.05.2014
E21C 35/183 14234468 Matthew Alan Sanan Matthew Alan SANAN; Cornelis Roelof JONKER
17. 2718050 TWIST DRILL TIPS, PRECURSOR CONSTRUCTIONSFOR USE IN MAKING SAME,
AND METHODS FOR MAKING AND USING SAME
EP 16.04.2014
B23B 51/02 12726814 ELEMENT SIX ABRASIVES SA
KASONDE Maweja; FRIES Robert; BARRY John
James; JONKER Cornelis Roelof
18. 20140084669 TIP FOR DEGRADATION TOOL AND TOOL COMPRISING SAME US 27.03.2014
E21C 35/183 14114876 Cornelis Roelof Jonker
Cornelis Roelof JONKER; David Christian BOWES;
Thembinkosi SHABALALA; Nedret CAN

4. 19. 2707573 TIP FOR DEGRADATION TOOL AND TOOL COMPRISING SAME EP 19.03.2014
E21C 35/183 12719404
ELEMENT SIX ABRASIVES
SA
Cornelis Roelof JONKER; David Christian BOWES;
Thembinkosi SHABALALA; Nedret CAN
20. 2707566 PICK TOOL EP 19.03.2014
E21B 10/567 12719403
ELEMENT SIX ABRASIVES
SA
Cornelis Roelof JONKER; David Christian BOWES;
Thembinkosi SHABALALA; Nedret CAN
21. 20140062163 PICK TOOL US 06.03.2014
E21C 35/183 14114881 Cornelis Roelof Jonker
Cornelis Roelof JONKER; David Christian BOWES;
Thembinkosi SHABALALA; Nedret CAN
22. 2691579 PICK ASSEMBLY, PICK HOLDER FOR SAME, PICKTOOL FOR SAME
AND STRIKE ELEMENT FOR SAME
EP 05.02.2014
E02F 3/20 12713061 ELEMENT SIX GMBH
JONKER Cornelis Roelof; RIES Bernd Heinrich; LACHMANN
Frank Friedrich
23. 20140015305 PICK ASSEMBLY, PICK HOLDER FOR SAME, PICK TOOL FOR
SAME AND STRIKE ELEMENT FOR SAME
US 16.01.2014
E01C 23/088 14007323 Jonker Cornelis Roelof
JONKER Cornelis Roelof; RIES Bernd Heinrich; LACHMANN
Frank Friedrich
24. WO/2014/005834 CUTTING INSERTS AND METHOD FOR MAKING SAME WO 09.01.2014
B22F 3/14 PCT/EP2013/062663
ELEMENT SIX ABRASIVES
S.A.
OLOFSSON, Bo Christer; JONKER, Cornelis Roelof; NILEN,
Roger William Nigel; ANDERSIN, Stig Åke; BARRY, John
James.
25. 2678526 SELF-ALIGNING INSERT AND DEGRADATION ASSEMBLY EP 01.01.2014
E21C 35/19 12704091 ELEMENT SIX GMBH
JONKER Cornelis Roelof; RIES Bernd Heinrich; LACHMANN
Frank Friedrich

5. 26. WO/2013/177278 CUTTING ELEMENTS FOR EARTH-BORING TOOLS,
EARTH-BORING TOOLS INCLUDING SUCHCUTTING ELEMENTS, AND
RELATED METHODS
WO 28.11.2013
E21B 10/46 PCT/US2013/042221
BAKER HUGHES
INCORPORATED
DIGIOVANNI, Anthony, A.; KADIOGLU, Yavuz; SCOTT, Danny, E.;
MEINER, Matthew, J.; MEINER, Matthew, J.; PESSIER, Rudolf,
Carl; LYONS,Nicholas,J.;VAN DERRIET, Clement,D.;HERSCHELL,
Donald, Royceton; JONKER, Cornelis, Roelof; NILEN, Roger,
William, Nigel; DOLAN, Gerard, Peter
27. WO/2013/144219 POLYCRYSTALLINESUPERHARD MATERIAL AND
METHOD FOR MAKING SAME
WO 03.10.2013
B22F 7/06 PCT/EP2013/056550
ELEMENT SIX ABRASIVES
S.A.
JONKER,CornelisRoelof;NILEN,RogerWilliam Nigel; KASONDE,
Maweja; ANDERSIN, Stig Åke;
28. WO/2013/110510 PICKTOOL AND ASSEMBLY COMPRISING SAME WO 01.08.2013
E21C 35/183 PCT/EP2013/050488
ELEMENT SIX ABRASIVES
S.A.
JONKER, Cornelis Roelof; FRIES, Robert; LACHMANN, Frank
Friedrich; RIES, Bernd Heinrich.
29. 2503355 MAKING A CUTTER WITH SHAPED SUPERHARD MATERIAL
LAYER
GB 31.07.2013
E21B 10/567 201310865
ELEMENT SIX ABRASIVES
SA
OLOFSSON Bo Christer; JONKER Cornelis Roelof; NILEN Roger
William Nigel; ANDERSIN Stig Ake; BARRY John James
30. WO/2013/092346 SUPER-HARD TIP FOR A PICKTOOL AND PICK TOOL
COMPRISING SAME
WO 27.06.2013
E21C 35/18 PCT/EP2012/075234
ELEMENT SIX ABRASIVES
S.A.
BUSH, Peter; RIES, Bernd Heinrich; FRIES, Robert; JONKER,
Cornelis Roelof.
31. WO/2013/064433 TIP FOR A PICK TOOL, METHOD OF MAKING SAME
AND PICK TOOL COMPRISING SAME
WO 10.05.2013
E21B 10/573 PCT/EP2012/071285
ELEMENT SIX ABRASIVES
S.A.
FRIES, Robert; JONKER, Cornelis Roelof.

6. 32. 2502676 THE MANUFACTUREOF POLYCRYSTALLINE SUPERHARD
MATERIAL
GB 08.05.2013
C04B 35/645 201305586
ELEMENT SIX
ABRASIVES SA
JONKER Cornelis Roelof; NILEN Roger William Nigel; KASONDE
Maweja; ANDERSIN Stig Åke
33. 20130068538 CUTTING ELEMENTS FOR EARTH-BORING TOOLS,
EARTH-BORING TOOLS INCLUDING SUCHCUTTING ELEMENTS, AND
RELATED METHODS
US 21.03.2013
E21B 10/567 13477905
Anthony A.
DiGiovanni
Anthony A. DIGIOVANNI; Yavuz KADIOGLU; Danny E. SCOTT;
Matthew J. MEINERS; Rudolf Carl PESSIER; Nicholas J. LYONS;
ClementD. VAN DER RIET; DonaldRoyceton HERSCHELL; Cornelis
Roelof JONKER;RogerWilliamNigel NILEN; Gerard Peter DOLAN
34. 20130047397 SUPERHARD TOOL TIP, METHOD FOR MAKING SAME
AND TOOL COMPRISING SAME
US 28.02.2013
B22F 7/06 13576049 JonkerCornelisRoelof
JONKERCornelisRoelof;FRIESRobert;KASONDEMaweja;BARRY
John James
35. 2498852 PICK TOOL AND ASSEMBLY COMPRISING SAME GB
27.02.2013
E21C 35/18 201300487
ELEMENT SIX
ABRASIVES SA
JONKER Cornelis Roelof; FRIES Robert; LACHMANN FRANK
Friedrich; RIES Bernd Heinrich
36. WO/2013/014192 TIPS FOR PICK TOOLS AND PICKTOOLS
COMPRISING SAME
WO 31.01.2013
E21C 35/183 PCT/EP2012/064609
ELEMENT SIX
ABRASIVES S.A.
SANAN, Matthew; JONKER, Cornelis Roelof.
37. 2498844 SUPER-HARD TIP FOR A PICK TOOL AND PICK TOOL
COMPRISING SAME
GB 23.01.2013
E21B 10/573 201222337
ELEMENT SIX
ABRASIVES SA
BUSH Peter; JONKER Cornelis Roelof; FRIES Robert; RIES Bernd
Heinrich

7. 38. WO/2012/171915 TWIST DRILL TIPS, PRECURSOR CONSTRUCTIONSFOR USE IN MAKING
SAME, AND METHODS FOR MAKING AND USING SAME
WO 20.12.2012
B23B 51/02 PCT/EP2012/061114 ELEMENT SIX ABRASIVES S.A.
Maweja KASONDE, Robert FRIES, John James
BARRY, Cornelis Roelof JONKER
39. 2533922 SUPERHARD TOOL TIP, METHOD FOR MAKING SAME AND TOOL COMPRISING
SAME
EP 19.12.2012
B22F 7/06 11705488 ELEMENT SIX PRODUCTION PTY LTD
JONKER Cornelis Roelof; FRIES Robert;
KASONDE Maweja; BARRY John James
40. 2498034 TIP FOR A PICK TOOL, METHOD OF MAKING SAME AND PICK TOOL
COMPRISING SAME
GB 12.12.2012
E21C 35/183 201219290 ELEMENT SIX ABRASIVES SA Robert FRIES, Cornelis Roelof JONKER
41. 2525931 SUPERHARD BODY, TOOL AND METHOD FOR MAKING SAME EP 28.11.2012
B22F 7/06 11703047 ELEMENT SIX ABRASIVES SA JONKER CORNELIS ROELOF; Maweja Kasonde
42. WO/2012/152847 PICKTOOL WO 15.11.2012
E21B 10/567 PCT/EP2012/058584 ELEMENT SIX ABRASIVES S.A.
JONKER, Cornelis Roelof; BOWES, David
Christian; SHABALALA, Thembinkosi; CAN,
Nedret.
43. WO/2012/152848 TIP FOR DEGRADATION TOOL AND TOOL COMPRISING SAME WO 15.11.2012
E21C 35/183 PCT/EP2012/058585 ELEMENT SIX ABRASIVES S.A.
JONKER, Cornelis Roelof; BOWES, David
Christian; SHABALALA, Thembinkosi; CAN,
Nedret.
44. WO/2012/130870 PICKASSEMBLY, PICK HOLDER FOR SAME, PICK TOOL FOR SAME AND
STRIKE ELEMENT FOR SAME
WO 04.10.2012
E02F 3/20 PCT/EP2012/055495 ELEMENT SIX GMBH
JONKER, Cornelis, Roelof; RIES, Bernd,
Heinrich; LACHMANN, Frank, Friedrich.

8. 45. 2493282 TIP FOR A PICK TOOL GB 05.09.2012
E21C 35/183 201213218 ELEMENT SIX ABRASIVES SA Matthew Alan SANAN; Cornelis Roelof JONKER
46. WO/2012/113707 SELF -ALIGNING INSERTAND DEGRADATION ASSEMBLY WO 30.08.2012
E21C 35/19 PCT/EP2012/052695 ELEMENT SIX GMBH
JONKER,Cornelis,Roelof;RIES, Bernd, Heinrich;
LACHMANN, Frank, Friedrich.
47. 2827914 INSERT AND DEGRADATION ASSEMBLY CA 30.08.2012
E21C 35/19 2827914 ELEMENT SIX GMBH
JONKER,Cornelis,Roelof;RIES, Bernd, Heinrich;
LACHMANN, Frank, Friedrich.
48. 2491956 TWIST DRILL TIPS, PRECURSOR CONSTRUCTIONSFOR USE IN MAKING SAME,
AND METHODS FOR MAKING AND USING SAME
GB 25.07.2012
B23B 51/02 201210330 ELEMENT SIX LTD
Maweja KASONDE; Robert FRIES; John James
BARRY; Cornelis Roelof JONKER
49. 2490793 PCD TIP FOR A PICK USED IN A MINING TOOL GB 20.06.2012
E21C 35/183 201208099 ELEMENT SIX ABRASIVES SA
JONKER, Cornelis Roelof; BOWES, David
Christian; SHABALALA, Thembinkosi; CAN,
Nedret.
50. 2490795 PCD TIP FOR A PICK USED IN A MINING TOOL GB 20.06.2012
E21C 35/183 201208107 ELEMENT SIX ABRASIVES SA
JONKER, Cornelis Roelof; BOWES, David
Christian; SHABALALA, Thembinkosi; CAN,
Nedret.
51. 2489589 PICK ASSEMBLY, PICK HOLDER FOR SAME, PICKTOOL FOR SAME AND STRIKE
ELEMENT FOR SAME
GB 09.05.2012
E21C 35/18 201205434 ELEMENT SIX GMBH
JONKER,Cornelis,Roelof;RIES, Bernd, Heinrich;
LACHMANN, Frank, Friedrich.
52. 2488408 INSERT AND DEGRADATION ASSEMBLY GB 04.04.2012
E21C 35/18 201202650 ELEMENT SIX GMBH
JONKER,Cornelis,Roelof;RIES, Bernd, Heinrich;
LACHMANN, Frank, Friedrich.

9. 53. 2389263 ABRASIVE INSERTS EP 30.11.2011
B22F 7/06 10702761 ELEMENT SIX ABRASIVES S A JONKER, Cornelis Roelof; FRIES, Robert.
54. 20110274885 ABRASIVE INSERTS US 10.11.2011
B32B 5/16 13145822 Jonker Cornelis Roelof JONKER, Cornelis Roelof; FRIES, Robert.
55. 20110226532 INSERT FOR AN ATTACK TOOL, METHOD FOR MAKING SAME AND TOOLS
INCORPORATING SAME
US 22.09.2011
E21B 7/00 13124855 Jonker Cornelis Roelof
Cornelis Roelof JONKER; Roger William Nigel
NILEN; Anthony A. DIGIOVANNI
56. WO/2011/098559 SUPERHARD TOOL TIP, METHOD FOR MAKING SAME AND TOOL
COMPRISING SAME
WO 18.08.2011
B22F 7/06 PCT/EP2011/052034 ELEMENT SIX ABRASIVES S.A.
Cornelis Roelof JONKER; Maweja KASONDE;
Robert FRIES; John James BARRY
57. WO/2011/089555 SUPERHARD BODY, TOOL AND METHOD FOR MAKING SAME WO
28.07.2011
B22F 7/06 PCT/IB2011/050239 ELEMENT SIX ABRASIVES S.A. JONKER, Cornelis, Roelof; KASONDE, Maweja.
58. MX/a/2011/004280 INSERT FOR ANATTACK TOOL, METHOD FOR MAKING SAME AND
TOOLS INCORPORATING SAME
mx 28.07.2011
E21B 10/46 MX/a/2011/004280 BAKER HUGHES INCORPORATED.*
Cornelis Roelof JONKER; Roger William Nigel
NILEN; Anthony A. DIGIOVANNI
59. 20110176879 SUPERHARD BODY, TOOL AND METHOD FOR MAKING SAME US 21.07.2011
B23B 51/02 13009346 Jonker Cornelis Roelof JONKER, Cornelis, Roelof; KASONDE, Maweja.

10. 60. 2342418 INSERT FOR AN ATTACK TOOL, METHOD FOR MAKING SAME AND TOOLS
INCORPORATING SAME
EP 13.07.2011
E21B 10/46 9744764 ELEMENT SIX LTD
CornelisRoelofJONKER;RogerWilliamNigel NILEN;
Anthony A. DIGIOVANNI
61. 170470 INSERT FOR AN ATTACK TOOL, METHOD FOR MAKING SAME AND TOOLS
INCORPORATING SAME
sg 30.05.2011
2011026853 ELEMENT SIX (PRODUCTION) (PTY) LTD
CornelisRoelofJONKER;RogerWilliamNigel NILEN;
Anthony A. DIGIOVANNI.
62. WO/2010/084472 ABRASIVE INSERTS WO 29.07.2010
B22F 7/06 PCT/IB2010/050280 ELEMENT SIX ABRASIVES S.A. JONKER, Cornelis Roelof; FRIES, Robert.
63. 2009/01042 POLYCRYSTALLINEDIAMOND ABRASIVE COMPACTS za 26.05.2010
C22C 2009/01042 ELEMENT SIX (PRODUCTION)(PTY)LTD
Barbara Mariëlle DE LEEUW-MORRISON, Cornelis
Roelof JONKER, Roger William Nigel NILEN
64. WO/2010/046863 INSERT FOR AN ATTACK TOOL, METHOD FOR MAKING SAME
AND TOOLS INCORPORATING SAME
WO 29.04.2010
E21B 10/46 PCT/IB2009/054649 ELEMENT SIX (PRODUCTION) (PTY) LTD
CornelisRoelofJONKER;RogerWilliamNigel NILEN;
Anthony A. DIGIOVANNI.
65. 2741197 INSERT FOR AN ATTACK TOOL, METHOD FOR MAKING SAME AND TOOLS
INCORPORATING SAME
CA 29.04.2010
E21B 10/46 2741197 BAKER HUGHES INCORPORATED
CornelisRoelofJONKER;RogerWilliamNigel NILEN;
Anthony A. DIGIOVANNI.
66. 20100064595 POLYCRYSTALLINE DIAMOND ABRASIVE COMPACTS US 18.03.2010
B24D 3/00 12447755 De Leeuw-Morrison Barbara Mariëlle
Barbara Mariëlle DE LEEUW-MORRISON, Cornelis
Roelof JONKER, Roger William Nigel NILEN

11. 67. 20100000158 POLYCRYSTALLINE DIAMOND ABRASIVE
COMPACTS
US 07.01.2010
B24D 3/04 12447779
Barbara Mariëlle DE LEEUW-MORRISON,CornelisRoelof JONKER, Roger
William Nigel NILEN
68. 101522346 POLYCRYSTALLINE DIAMOND ABRASIVE COMPACTS CN 02.09.2009
B22F 7/06 2.0078E+11
Element Six Production Pty
Ltd.
Barbara Mariëlle DE LEEUW-MORRISON,CornelisRoelof JONKER, Roger
William Nigel NILEN
69. 2094418 POLYCRYSTALLINE DIAMOND ABRASIVE COMPACTS EP 02.09.2009
B22F 7/06 7826923
ELEMENT SIX PRODUCTION
PTY LTD
Barbara Mariëlle DE LEEUW-MORRISON,CornelisRoelof JONKER, Roger
William Nigel NILEN
70. 1020090086999 POLYCRYSTALLINE DIAMOND ABRASIVE
COMPACTS
KR 14.08.2009
B22F 7/06 1.0201E+25
ELEMENT SIX
(PRODUCTION) (PTY) LTD.
Barbara Mariëlle DE LEEUW-MORRISON,CornelisRoelof JONKER, Roger
William Nigel NILEN
71. WO/2009/053903 A PICK BODY WO 30.04.2009
E21C 35/183 PCT/IB2008/054331
ELEMENT SIX
(PRODUCTION) (PTY) LTD
FRIES, Robert; JONKER, Cornelis, Roelof; LACHMANN, Frank, Friedrich;
HILDEBRAND, Karl, Georg; RIES, Bernd, Heinrich.
72. 2053198 A PICK BODY EP 29.04.2009
E21C 35/183 7254182
ELEMENT SIX PRODUCTION
PTY LTD
FRIES, Robert; JONKER, Cornelis, Roelof; LACHMANN, Frank, Friedrich;
HILDEBRAND, Karl, Georg; RIES, Bernd, Heinrich.
73. WO/2008/053430 POLYCRYSTALLINEDIAMOND ABRASIVE
COMPACTS
WO 08.05.2008
C22C 26/00 PCT/IB2007/054409
ELEMENT SIX
(PRODUCTION) (PTY) LTD
Barbara Mariëlle DE LEEUW-MORRISON,CornelisRoelof JONKER, Roger
William Nigel NILEN

12. 74. WO/2008/053431 POLYCRYSTALLINEDIAMOND ABRASIVE
COMPACTS
WO 08.05.2008
B22F 7/06 PCT/IB2007/054410
ELEMENT SIX (PRODUCTION)
(PTY) LTD
Barbara Mariëlle DE LEEUW-MORRISON, Cornelis Roelof JONKER,
Roger William Nigel NILEN
75. 1854858 ABRASIVE MATERIAL COMPRISING ELONGATE ABRASIVE
BODIES
EP 14.11.2007
C09K 3/14 7075408 DE BEERS IND DIAMOND
RobertFRIES,CornelisRoelof JONKER,IakovosSIGALAS,PeterWilliam
BROWN
76. 20070186483 COMPOSITE ABRASIVE COMPACT US 16.08.2007
B23F 21/00 11712067 TANK KLAUS TANK Klaus; JONKER Cornelis Roelof
77. 2004/05772 COMPOSITE ABRASIVE COMPACT za 28.03.2007
E21B 2004/05772 ELEMENT SIX (PTY) LTD Klaus TANK; Cornelis Roelof JONKER
78. 20060166615 COMPOSITE ABRASIVE COMPACT US 27.07.2006
B23F 21/00 10503323 TANK KLAUS Klaus TANK; Cornelis Roelof JONKER
79. 1625640 COMPOSITE ABRASIVE COMPACT CN 08.06.2005
E21B 10/56 3803086.1 Element Six Pty Ltd. Klaus TANK; Cornelis Roelof JONKER
80. 1020040093695 COMPOSITE ABRASIVE COMPACT KR 08.11.2004
E21B 10/56 1.02005E+12 ELEMENT SIX (PTY) LTD. Klaus TANK; Cornelis Roelof JONKER

13. 81. 1470315 COMPOSITE ABRASIVE COMPACT EP 27.10.2004
E21B 10/56 3702806 ELEMENT SIX PTY LTD Klaus TANK; Cornelis Roelof JONKER
82. 2002/05631 ABRASIVE MATERIAL COMPRISING ELONGATEABRASIVE BODIES za 29.09.2004
B24D 2002/05631
DE BEERS INDUSTRIAL DIAMONDS
(PROPRIETRY) LIMITED
Robert FRIES, Cornelis Roelof JONKER, Iakovos
SIGALAS, Peter William BROWN
83. WO/2003/064806 COMPOSITEABRASIVE COMPACT WO 07.08.2003
E21B 10/56 PCT/IB2003/000206 ELEMENT SIX (PTY) LTD Klaus TANK; Cornelis Roelof JONKER
84. 1313821 METHOD FOR THE MANUFACTUREOF AN ABRASIVE MATERIAL
COMPRISING ELONGATE ABRASIVE BODIES
EP 28.05.2003
C09K 3/14 954817 ELEMENT SIX ABRASIVES SA
Robert FRIES, Cornelis Roelof JONKER, Iakovos
SIGALAS, Peter William BROWN
85. WO/2001/016249 ABRASIVE MATERIAL COMPRISING ELONGATEABRASIVE BODIES WO 08.03.2001
C09K 3/14 PCT/IB2000/001215
DE BEERS INDUSTRIAL DIAMONDS
(PROPRIETARY) LIMITED
Robert FRIES, Cornelis Roelof JONKER, Iakovos
SIGALAS, Peter William BROWN