<2019-JP> Firm Ranking of the number of Japanese granted patents in the Medical device field in 2019

2020-05-14 2020-04-19

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 2019 (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	162	SUZUYE & SUZUYE Intellectual Property Law	View
2	126	Sakai International Patent Office	View
3	122	Toranomon Intellectual Property Firm	View
4	121	Ohtsuka Patent Office	View
5	118	In-house patent attorney	－
6	103	ITOH-SHIN PATENT OFFICE	View
7	97	SHIGA International Patent Office	View
8	89	LUKE'S International Patent Firm	N/A
9	83	TAIYO, NAKAJIMA & KATO	View
10	80	Tokyo International Parent Firm	View
11	60	SUGIMURA & Partners	View
12	52	IP Firm SHUWA	View
13	49	Matsuura & Associates	View
14	49	Polaire Intellectual Property Corporation	View
15	47	TADA, MIYAGAWA & HORII Patent, Trademark and Design Agents	View
16	45	Kyoritsu Institute	View
17	42	Aoyama & Partners	View
18	42	Soei Patent & Law Firm	View
19	40	KOSHIKAWA & Co.	View
20	38	Koyo International Patent Firm	View
21	38	YKI Intellectual Property Attorneys	View
22	36	Fukami Patent Office, P.C.	View
23	36	HATTA & ASSOCIATES	View
24	34	ION PATENT	View
25	34	Olive International Patent Office	View
26	33	Toho International Patent & Law Office	View
27	33	KOKUBUN INTERNATIONAL PATENTS & TRADEMARKS	View
28	30	Sugitani Patent Office(★★Tsutomu)	N/A
29	30	TMI Associates	View
30	28	YUASA AND HARA	View
31	28	SATO & ASSOCIATES	View
32	28	In-house patent attorney	－
33	27	ITOH International Patent Office	View
34	26	Koh-Ei Patent Firm, P.C.	View
35	24	IP Firm SHUWA	View
36	24	Okabe International Patent Office	View
37	24	SEIWA PATENT & LAW	View
38	23	Washida & Associates	View
39	22	Isono International Patent Office, P. C.	View
40	22	Otubo Patent firm	N/A

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.