<2021-All> Firm Ranking of the number of Japanese granted patents in the Medical device field in 2021

2022.09.29 2022.10.05

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 2021 (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).

Ranking	No.	IP law firm	Web
1	435	SHINSEI PATENT OFFICE	View
2	344	SHIGA International Patent Office	View
3	254	SHUSAKU・YAMAMOTO	View
4	251	ITOH International Patent Office	View
5	233	SEIWA PATENT & LAW	View
6	220	Nakamura & Partners	View
7	215	SUZUYE & SUZUYE Intellectual Property Law	View
8	177	M&S Partners	View
9	174	ONDA TECHNO Intl. Patent Attys	View
10	159	Sakai International Patent Office	View
11	146	In-house patent attorney	－
12	138	TAIYO, NAKAJIMA & KATO	View
13	138	TANI & ABE, p.c.	View
14	128	YUASA AND HARA	View
15	124	Aoyama & Partners	View
16	121	Toranomon Intellectual Property Firm	View
17	120	Fukami Patent Office, P.C.	View
18	102	SUGIMURA & Partners	View
19	97	HARAKENZO WORLD PATENT & TRADEMARK	View
20	97	SUBARU PATENT OFFICE	View
21	86	Soei Patent & Law Firm	View
22	85	Koyo International Patent Firm	View
23	85	ITOH-SHIN PATENT OFFICE	View
24	83	Ohtsuka Patent Office	View
25	81	TMI Associates	View
26	72	Okuyama & Sasajima	View
27	72	YKI Intellectual Property Attorneys	View
28	70	Shobayashi International Patent &Trademark Office	View
29	68	Washida & Associates	View
30	67	LUKE'S International Patent Firm	N/A
31	67	HATTA & ASSOCIATES	View
32	65	Takaoka IP Law	View
33	60	Matsuura & Associates	View
34	60	In-house patent attorney	－
35	60	IP Firm SHUWA	View
36	56	Asamura Patent Office, p.c.	View
37	56	Toho International Patent & Law Office	View
38	56	Sonderhoff & Einsel	View
39	55	Kyoritsu Institute	View
40	52	Kita-Aoyama International Patent Bureau	View
41	52	KYOWA PATENT AND LAW OFFICE	View
42	51	Hiraki & Associates	View
43	49	Kai-U Patent Law Firm	View
44	48	Sonoda & Kobayashi	View
45	48	Tokyo International Parent Firm	View
46	46	NII Patent Firm	View
47	45	Shinjyu GLOBAL IP	View
48	44	SAEGUSA & Partners	View
49	43	Shimizu Patent Office	View
50	42	Miyazono 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.