1.
USING PATSEER TO SEARCH & ANALYZE
PATENTS ON INDUCTIVE CHARGING
Note: All analysis and charts shown in this report have been prepared online using PatSeer. This report should not be construed as
business advice and the insights are not to be used as the basis for investment or business decisions of any kind without your own
research and validation. Gridlogics Technologies Pvt. Ltd disclaims all warranties whether express, implied or statutory, of reliability,
accuracy or completeness of results, with regards to the information contained in this report.

2.
Inductive Charging - Overview
• Wireless charging (also known as inductive charging) uses an electromagnetic field to transfer
energy between two objects. Inventor Nikola Tesla was the first to demonstrate wireless power
transmission in 1891, when he succeeded in lighting electric lamps without wires.
• It took over a century for the technology to find its way into the mainstream, but over the past few
years wireless charging has finally emerged onto the consumer electronics market.
• Some smartphones and smartphone accessories now have wireless charging capabilities built-in,
and the technology is being integrated into all sorts of devices, appliances, public spaces and
even vehicles, as companies look to make power cords obsolete.
• For example, wireless charging pads can already be seen at around 50 McDonald’s locations in
the UK. Most of these commercial products use the magnetic-inductive method of charging, which
involves coupling a device to a physical dock. If you have ever used an electric toothbrush or
shaver, for example, then you may be familiar with this type of inductive charging.
• The technology requires two coils: a transmitter and a receiver. An alternating current is passed
through the transmitter, generating a magnetic field. This in turn induces a voltage in the receiver,
which can be used to power a mobile device or charge a battery.
• Apart from the obvious benefit of removing the need for power cords, wireless charging has the
advantage of being more durable (there is significantly less wear and tear) and more eco-friendly
(there is no electronic waste, and energy transfer is non-radiative)
• Wireless charging is one of the fastest moving areas within the fast-moving electric vehicle
industry. New technologies hold great promise for extending ranges, reducing cost, and liberating
electric vehicle drivers from the need to plug in. Some of these technologies are already being
implemented, particularly with buses and heavier electric vehicles.

3.
Search Methodology
Using PatSeer as database a sequence of steps was used to create our search query. Since, in
PatSeer results are not grouped by families by default we searched individual publications and then
collapsed them by one member per Family.
The publications included in the report are updated as of 10th December 2015.
TAC:((inductive* OR wireless*) wd2 (charg* OR transfer*) OR WPT OR inductive_charg* OR wireless_charg*)
AND
(
IC: (H02J* OR B60L* OR H01F* OR H01M* OR H04B* OR G08C* OR G06F* OR H04W*)
OR
CPC:(H02J* OR B60L* OR H01F* OR H01M* OR H04B* OR G08C* OR G06F* OR H04W*)
)
AND
APY:[1995 TO 2015]
L1
L2
L3

4.
• While searching for relevant results for inductive charging, search scripts were used and the respective
query identifiers (L1/L2/L3,as shown in the screenshots) were combined using the AND operator to
form the final query
Search Methodology

5.
• The results were deduplicated by Extended (INPADOC) Families to give unique inventions
• 10502 unique inventions were added to a PatSeer Project for further analysis

6.
The search results were added to a PatSeer Project and classified around following three key
areas:
1. Technologies
2. Hardware
3. Applications
Inductive Charging Technology Categorization
Note : All the charts and analysis in this report have been generated on INPADOC Families

7.
Filing Trend (By Earliest Priority Year)
• Chart shows the filing trend for inductive charging in the last 20 years
• Number of publications have been increasing steadily with a steep rise in 2011

8.
Top Companies
• The chart shows top 15 companies ranked by number of unique inventions
• Samsung Electronics is at the top followed by Qualcomm and LG Electronics

9.
Priority Country Map – Where is research being done?
• The map shows the geographical spread of patents first filed. It shows perfect indication
of where innovation is taking place
• It can be seen that China has 3361 filings (INPADOC Families) closely followed by US
and KR with 2561 and 1712 filings respectively.

10.
Growth of filings across top 5 countries (1995 – 2015)
• The chart below shows the number of new inventions filed in each priority jurisdiction for the
period 1995 to 2015
• Filings from China started emerging only after 2001
• Patenting activity around inductive charging grew substantially in all the countries from 2011.
China leads the number of filings during that period

11.
Where are researching teams of key companies located and which
hardware component are they focusing on?
• The chart shows leading companies across priority countries and various types of hardware
components. (The left stack is for priority country and the right is for Hardware Component)
• LG and Samsung have new filings originating from more than one country.

12.
Technology Trend over last 10 years
• The chart below represents the filing trend for different technologies used for inductive charging in the
last ten years
• Inductive Coupling, Electromagnetic wave ,Resonant Magnetic and Electromagnetic Induction have
grown at a faster rate as compared to others

13.
Trend for various applications of Inductive Charging over the last 20
years
• The chart below represents the growth for different applications of Inductive Charging for the last 20
years
• Use of wireless charging in the Automobile and Smartphone industry has seen tremendous rise since
2008, with the automobile industry surpassing smartphones in 2011

14.
Top Companies across different Sub-Technologies
• The chart below represents the records for top ten companies across different types of Sub-
technologies used for Inductive Charging
• Samsung leads the list of companies with research interest around Resonant Magnetic Coupling and
Electromagnetic Wave Type
• Korea Advanced Institute of Science and Technology (KAIST) has major research interest in
Electromagnetic Induction for Inductive Charging

15.
Top Companies across different Applications
• The chart below represents the records for top ten companies across different applications of
Inductive Charging
• KAIST leads the list of companies across automobile applications with more than 70% of their
portfolio concentrating around various automobile applications
• Samsung has research interest across Electronics, Defence and Automobile applications

16.
Key companies applying wireless charging in Automobile
Industry

17.
Key companies applying wireless charging in Medical
Devices Industry

18.
Key companies applying wireless charging in Defence
Industry

19.
This section focuses on 4 companies primarily into inductive charging:
• POWERMAT
• MOJO MOBILITY
• WITRICITY
• POWERBYPROXI
It also highlights which areas in Inductive Charging are being targeted
by these companies.
Company Spotlight

20.
Innovation Timeline
• The following table shows number of new patents filed by the companies over the last 8 years. (The
table also includes the co-applicants of the companies)
• Witricity (industry pioneer in wireless power transfer over distance) leads the number of applications
filed in the last three years followed by Powermat

21.
Innovations across different areas of inductive charging
• The chart below shows number of patents held by key companies across various segments of inductive
charging
• Witricity and Mojo Mobility are more into the applications of inductive charging as compared to the
hardware and technology aspect
• Powermat has more inventions on sub-technologies used in inductive charging

22.
• The chart below shows number of patents held by key companies across sub technologies
• Inductive coupling is used by most of the companies and Powermat leads with 21 records
• Witricity is the only company using Resonant Inductive Coupling technology
Innovations across sub technologies of inductive
charging

23.
• The chart below shows number of patents held by key companies across different hardware
components used for inductive charging
• Witricity and Powermat are the only companies using Power Amplifiers and Oscillators
• Powermat leads the record count for Rectifiers and Receivers
Innovations across different hardware segments of
inductive charging

24.
• The chart below shows number of patents held by key companies across different industries
• Mojo Mobility has presence across all the different industries
• Powerbyproxi primarily focuses on the electronic applications of wireless charging
Innovations across Industries

25.
PatSeer Overview
Coverage
 40 million+ full text records of 21 countries and 95 million+ biblio records covering 102 + countries
 PDFs, Front Page Images, Mosaics, Simple/Extended Families, Bwd/Fwd Citations and more
 New publications updated the same week
Search
 Search full-text in Original Language and English. (English title and abstract taken from equivalent family
member where not available)
 Legal Status Search enhancements include date range, Event, Event Country (Incl. Designated Country Code
events for EP,WO)
 No compromise on search techniques –Proximity, complex Boolean with proximity, command line searching,
wildcards, truncation
Search Aids
 Normalized Assignee Names for Top 3000 companies
 Looking up Matching Assignee /Inventor names
 Semantic Search Suggester
 Integrated Corporate Tree
 Search History, Saved Searches and Alerts
Search Result Handling
 Collapse results by family or de-duplicate Patent and Applications from results
 Multiple Views (Tabular/Standard/Standard+Family), Custom View, Detailed Record View
 Multiple Detailed view of a records can be opened in separate window tabs to allow for easy comparison
Analysis
 Analyze search results via charts (column/line/pie/area/bubble/heatmap/geographical map)
 Unique Chart Layering technology allows for Multi and Cross Dimensional charting
Exports
 Export upto 20K records at a time in Word/Excel/CSV format
 Charts can be also included in Word and Excel exports
Projects
 Save and analyze upto 50K records in a project
 Custom Fields, Hierarchical Categories, Comments, Flags, Scoring
 Patent Dashlets™ - A different dashboard for each collaborating member

26.
PatSeer
40 million+ Full Text
Records from 21
Patent Offices (US, EP,
WO, DE, FR, GB, JP,
KR, CN, ES, CA, CH,
AT, AU, IN, BR, TH,
RU, PH, SE and NO)
DOCDB
92 million+
Biblio records
covering 102+
countries
INPADOC
40 million+
Families and
Legal Status
Normalized
Assignee
Names for Top
3000
Companies
Corporate Tree
for top 3000
patent holding
Corporate
Groups
US
Reassignments
and
Maintenance
Data
Semantic Index of
Conceptually
Related Terms for
Search Assistance
PDFs,
Mosaic,
Calculated
Fields and
more..
Searchable Full
Text English
Translations of
KR, DE, CN, JP
and FR
PatSeer Database Content
Value Added
Content

27.
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