The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.

  • Technical field:  Catheter (balloon catheter, robotic catheter system, intravenous catheter apparatus, etc.)
  • Status:  Japanese granted patents in 2018 (registration date).
  • First country:  All (i.e., patents with claiming priority of a Japanese application or a foreign application, or without claiming priority).
  • Count:  The number of patents handled by each Japanese IP law firm was counted (if the applicant is represented by a firm member (attorney), it was counted as being handled by the firm).
RankingNo.IP law firmWebsite
146SHINSEI PATENT OFFICE View
230SEIWA PATENT & LAW View
328ONDA TECHNO Intl. Patent Attys View
426SHUSAKU・YAMAMOTO View
525SHIGA International Patent Office View
622YUASA AND HARA View
721TANI & ABE, p.c. View
820ITOH International Patent Office View
919Aoyama & Partners View
1016Kai-U Patent Law Firm View
1115M&S Partners View
1215Nakamura & Partners View
1314Toho International Patent & Law Office View
1411HATTA & ASSOCIATES View
1511In-house patent attorney
1611Sonare IP Firm View
1710Soei Patent & Law Firm View
189Aichi & Mashiko Patent Firm Ochanomizu Office View
199ASAHI & MASUDA PATENT & TRADEMARK ATTORNEYS View
209Fukami Patent Office, P.C. View
In preparing the table, a patent search expert conducted a patent search using patent classification and keywords (as necessary) in order to extract patents in specific technical field (here, Catheter field).
In the patent search, it was confirmed that a high-accuracy population (i.e., a population not including non-relevant fields) of patents was obtained. Subsequently, the population was used to create the table.

By entering the Firm name or Attorney name in the "Legal Representative Name" column of Patentscope (search system of WIPO), you can find the patent information handled by each Firm.

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