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

2020-05-15 2021-05-31

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: 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	Website
1	338	SHINSEI PATENT OFFICE	View
2	312	SHIGA International Patent Office	View
3	308	ITOH International Patent Office	View
4	280	SHUSAKU・YAMAMOTO	View
5	232	SUZUYE & SUZUYE Intellectual Property Law	View
6	206	SEIWA PATENT & LAW	View
7	163	Nakamura & Partners	View
8	150	Toranomon Intellectual Property Firm	View
9	150	M&S Partners	View
10	149	In-house patent attorney	－
11	143	Ohtsuka Patent Office	View
12	136	ONDA TECHNO Intl. Patent Attys	View
13	131	Aoyama & Partners	View
14	131	Sakai International Patent Office	View
15	124	In-house patent attorney	－
16	122	YUASA AND HARA	View
17	120	SUBARU PATENT OFFICE	View
18	117	TANI & ABE, p.c.	View
19	111	TAIYO, NAKAJIMA & KATO	View
20	105	ITOH-SHIN PATENT OFFICE	View
21	103	Fukami Patent Office, P.C.	View
22	95	LUKE'S International Patent Firm	N/A
23	92	SUGIMURA & Partners	View
24	85	TMI Associates	View
25	81	Tokyo International Parent Firm	View
26	79	Soei Patent & Law Firm	View
27	72	YKI Intellectual Property Attorneys	View
28	65	Kai-U Patent Law Firm	View
29	60	HARAKENZO WORLD PATENT & TRADEMARK	View
30	58	IP Firm SHUWA	View
31	56	Takaoka IP Law	View
32	53	Sonderhoff & Einsel	View
33	52	Matsuura & Associates	View
34	51	Okuyama & Sasajima	View
35	49	Polaire Intellectual Property Corporation	View
36	48	Shobayashi International Patent &Trademark Office	View
37	47	TADA, MIYAGAWA & HORII Patent, Trademark and Design Agents	View
38	46	In-house patent attorney	－
39	45	Kyoritsu Institute	View
40	44	HATTA & ASSOCIATES	View
41	44	Hiraki & Associates	View
42	44	KOSHIKAWA & Co.	View
43	43	Miyoshi & Miyoshi	View
44	42	OSHIMA & PARTNERS	View
45	39	Koyo International Patent Firm	View
46	39	KYOWA PATENT AND LAW OFFICE	View
47	39	Olive International Patent Office	View
48	38	KAWAGUTI & PARTNERS	View
49	38	KOKUBUN INTERNATIONAL PATENTS & TRADEMARKS	View
50	38	Washida & Associates	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.