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

2020-05-13 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: Foreign (i.e., patents with claiming priority of a foreign application, or patents based on PCT application whose receiving office is not 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	338	SHINSEI PATENT OFFICE	View
2	281	ITOH International Patent Office	View
3	276	SHUSAKU・YAMAMOTO	View
4	215	SHIGA International Patent Office	View
5	182	SEIWA PATENT & LAW	View
6	155	Nakamura & Partners	View
7	150	M&S Partners	View
8	149	In-house patent attorney	－
9	118	SUBARU PATENT OFFICE	View
10	115	ONDA TECHNO Intl. Patent Attys	View
11	114	TANI & ABE, p.c.	View
12	94	YUASA AND HARA	View
13	89	Aoyama & Partners	View
14	70	SUZUYE & SUZUYE Intellectual Property Law	View
15	67	Fukami Patent Office, P.C.	View
16	62	Kai-U Patent Law Firm	View
17	55	TMI Associates	View
18	55	Takaoka IP Law	View
19	53	Sonderhoff & Einsel	View
20	47	Okuyama & Sasajima	View
21	39	HARAKENZO WORLD PATENT & TRADEMARK	View
22	38	OSHIMA & PARTNERS	View
23	37	KAWAGUTI & PARTNERS	View
24	37	Soei Patent & Law Firm	View
25	35	Yoshikawa International Patent Office	View
26	35	Shimizu Patent Office	View
27	35	Kita-Aoyama International Patent Bureau	View
28	35	Shobayashi International Patent &Trademark Office	View
29	34	YKI Intellectual Property Attorneys	View
30	33	Sonoda & Kobayashi	View
31	32	SUGIMURA & Partners	View
32	30	TSUKUNI & ASSOCIATES	View
33	28	Asamura Patent Office, p.c.	View
34	28	Toranomon Intellectual Property Firm	View
35	28	TAIYO, NAKAJIMA & KATO	View
36	26	Hiraki & Associates	View
37	24	RYUKA IP LAW FIRM	View
38	24	KYOWA PATENT AND LAW OFFICE	View
39	23	Miyoshi & Miyoshi	View
40	22	Ohtsuka 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.