This case study provides an example of how to know better patent applicants at the French Patent Office using the French patent database. Key questions for this applicants’ analysis are: What are the different types of patent applicants? What are the geographical localisations of patent applicants? What are the technological domains of applicants and do they have several domains? Do patent applicants often extend their French patent applications? What are the links between applicants’ types and technological domains, international extension, or geographical localisations?