<2018-JP> Firm Ranking of the number of Japanese granted patents in the Medical device field in 2018

2019-03-29 2019-04-28

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 2018 (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).

Ranking	No.	IP law firm	Website
1	177	SUZUYE & SUZUYE Intellectual Property Law	View
2	162	ITOH-SHIN PATENT OFFICE	View
3	129	Toranomon Intellectual Property Firm	View
4	116	Sakai International Patent Office	View
5	106	In-house patent attorney	－
6	104	Ohtsuka Patent Office	View
7	101	SHIGA International Patent Office	View
8	91	TAIYO, NAKAJIMA & KATO	View
9	74	Kyoritsu Institute	View
10	73	Tokyo International Parent Firm	View
11	67	Koyo International Patent Firm	View
12	61	SUGIMURA & Partners	View
13	57	Misawa Patent, p.c.	View
14	55	IP Firm SHUWA	View
15	53	Washida & Associates	View
16	52	Polaire Intellectual Property Corporation	View
17	51	Soei Patent & Law Firm	View
18	46	Olive International Patent Office	View
19	45	In-house patent attorney	－
20	45	TADA, MIYAGAWA & HORII Patent, Trademark and Design Agents	View
21	44	LUKE'S International Patent Firm	None
22	36	YKI Intellectual Property Attorneys	View
23	34	HATTA & ASSOCIATES	View
24	33	Sonare IP Firm	View
25	33	Matsuura & Associates	View
26	33	Isono International Patent Office, P. C.	View
27	31	Toho International Patent & Law Office	View
28	31	SATO & ASSOCIATES	View
29	31	Aoyama & Partners	View
30	31	Okabe International Patent Office	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, 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.