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

  • Technical field:  Medical device (syringe, stent, endoscope apparatus, X-ray imaging apparatus, etc.)
  • Status:  Japanese granted patents in 2017 (registration date).
  • First country:  Japan (i.e., (i) patents with claiming priority of a Japanese application, (ii) patents based on Japanese domestic application, or (iii) patents based on PCT application whose receiving office is Japan Patent Office without claiming any 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
2271SUZUYE & SUZUYE Intellectual Property Law View
3164Sakai International Patent Office View
4148Toranomon Intellectual Property Firm View
5133SHIGA International Patent Office View
6116In-house patent attorney
7103Ohtsuka Patent Office View
884Olive International Patent Office View
1070Soei Patent & Law Firm View
1169IP Firm SHUWA View
1265Misawa Patent, p.c. View
1363In-house patent attorney
1462YKI Intellectual Property Attorneys View
1558Washida & Associates View
1656Aoyama & Partners View
1756Tokyo International Parent Firm View
1853In-house patent attorney
1951Koyo International Patent Firm View
2048Matsuoka & Co. View
2148In-house patent attorney
2247Toho International Patent & Law Office View
2344SUGIMURA & Partners View
2540Kyoritsu Institute View
2640RIVERFLOW international patent firm View
2738Yanagida & Associates View
2838Kyoritsu Institute View
2937Matsuura & Associates View
3036LUKE'S International Patent FirmNone
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, Medical device 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.

Sponsored link
Recommended articles