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

2019-03-28 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: 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	446	SHINSEI PATENT OFFICE	View
2	360	ITOH International Patent Office	View
3	304	SHIGA International Patent Office	View
4	269	SHUSAKU・YAMAMOTO	View
5	241	SUZUYE & SUZUYE Intellectual Property Law	View
6	196	SEIWA PATENT & LAW	View
7	172	Nakamura & Partners	View
8	171	In-house patent attorney	－
9	166	ONDA TECHNO Intl. Patent Attys	View
10	163	ITOH-SHIN PATENT OFFICE	View
11	148	Toranomon Intellectual Property Firm	View
12	142	SUBARU PATENT OFFICE	View
13	135	TANI & ABE, p.c.	View
14	127	Sakai International Patent Office	View
15	125	YUASA AND HARA	View
16	122	M&S Partners	View
17	117	Ohtsuka Patent Office	View
18	113	TAIYO, NAKAJIMA & KATO	View
19	111	Aoyama & Partners	View
20	106	In-house patent attorney	－
21	101	Fukami Patent Office, P.C.	View
22	94	Soei Patent & Law Firm	View
23	88	SUGIMURA & Partners	View
24	87	In-house patent attorney	－
25	80	TMI Associates	View
26	80	YKI Intellectual Property Attorneys	View
27	74	Kyoritsu Institute	View
28	73	Tokyo International Parent Firm	View
29	67	Koyo International Patent Firm	View
30	67	Sonderhoff & Einsel	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.