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

2022-09-30 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: 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	Web
1	155	Sakai International Patent Office	View
2	150	SUZUYE & SUZUYE Intellectual Property Law	View
3	118	SHIGA International Patent Office	View
4	108	Toranomon Intellectual Property Firm	View
5	102	TAIYO, NAKAJIMA & KATO	View
6	85	ITOH-SHIN PATENT OFFICE	View
7	82	Koyo International Patent Firm	View
8	74	SUGIMURA & Partners	View
9	68	Fukami Patent Office, P.C.	View
10	64	Ohtsuka Patent Office	View
11	62	HATTA & ASSOCIATES	View
12	61	LUKE'S International Patent Firm	N/A
13	60	In-house patent attorney	－
14	58	Matsuura & Associates	View
15	55	Kyoritsu Institute	View
16	54	Toho International Patent & Law Office	View
17	48	Washida & Associates	View
18	47	Tokyo International Parent Firm	View
19	45	Soei Patent & Law Firm	View
20	41	ITOH International Patent Office	View
21	41	NII Patent Firm	View
22	41	Miyazono Patent Office	View
23	39	ION PATENT	View
24	39	IP Firm SHUWA	View
25	38	Sankyo International Patent Attorneys Office	View
26	37	Sonare IP Firm	View
27	36	MAEDA & PARTNERS	View
28	34	TADA, MIYAGAWA & HORII Patent, Trademark and Design Agents	View
29	34	SATO & ASSOCIATES	View
30	33	U'sfi Patent Attorneys International Office	View
31	31	Shin-Ei Patent Firm, P.C.	View
32	30	HARAKENZO WORLD PATENT & TRADEMARK	View
33	30	Shobayashi International Patent &Trademark Office	View
34	30	Aoyama & Partners	View
35	30	TMI Associates	View
36	29	SOYO International IP Attorneys	View
37	28	Okabe International Patent Office	View
38	27	ONDA TECHNO Intl. Patent Attys	View
39	26	MAEDA & SUZUKI PATENT Co., Ltd.	View
40	25	Patent Corporate Body ARCO PATENT OFFICE	View
41	25	KASAI & NAKANE INTERNATIONAL PATENT FIRM	View
42	24	Hiraki & Associates	View
43	24	YKI Intellectual Property Attorneys	View
44	24	Koh-Ei Patent Firm, P.C.	View
45	24	Polaire Intellectual Property Corporation	View
46	22	In-house patent attorney	－
47	22	Eikoh Patent Firm, P.C.	View
48	22	KOHNO & KOHNO	View
49	22	Tokyo Central Patent Firm	View
50	22	KYOWA PATENT AND LAW 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.