[Adhesive material] Firm Ranking of the number of Japanese granted patents in the Adhesive material field in 2020

2021-07-23 2021-07-23

The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.

Technical field: Adhesive material (adhesive composition/film/sheet, etc.)
Status: Japanese granted patents in 2020 (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	142	SHIGA International Patent Office	View
2	60	Unius Patent Attorneys Office	View
3	49	In-house patent attorney	－
4	41	Soei Patent & Law Firm	View
5	38	KYODO PATENT LAW FIRM	View
6	38	SANSUI PATENT FIRM	View
7	37	Ohtani Patent Office	View
8	32	SIKs & Co.	View
9	30	Aoyama & Partners	View
10	29	YASUTOMI & Associates	View
11	28	Fukami Patent Office, P.C.	View
12	27	HATTA & ASSOCIATES	View
13	23	SAEGUSA & Partners	View
14	20	GOTO & CO.	View
15	20	SEIWA PATENT & LAW	View
16	20	TAIYO, NAKAJIMA & KATO	View
17	19	In-house patent attorney	－
18	19	Patent Profession Corporation Kinoshita & Associates	View
19	19	TMI Associates	View
20	17	Trust International Patent Office	View
21	16	MOMII & ASSOCIATES	View
22	15	Eimei Patent Office	N/A
23	15	Sakai International Patent Office	View
24	15	Miyazaki & Metsugi	View
25	15	Prezio IP Firm	View
26	14	Abe, Ikubo & Katayama	View
27	14	ION PATENT	View
28	13	ASAHI & MASUDA PATENT & TRADEMARK ATTORNEYS	View
29	13	HIBIKI IP LAW FIRM	View
30	13	SSINPAT PATENT FIRM	View
31	12	SUGIMURA & Partners	View
32	11	K.ITO & ASSOCIATES	View
33	11	Daiya Patent Office	View
34	11	Tenma International Patent Firm	N/A
35	10	LEXIA PARTNERS	View
36	10	HARAKENZO WORLD PATENT & TRADEMARK	View
37	10	Sonderhoff & Einsel	View
38	9	KAWAGUTI & PARTNERS	View
39	9	TSUKUNI & ASSOCIATES	View
40	9	Hirota, Nagare & Associates	View
41	9	NICHIEI Patent and Trademark Attorneys	View
42	8	Ishibashi Patent Firm	N/A
43	8	Sigma International Patent Office	View
44	8	AXIS Patent International	View
45	8	Tajime International Patent Firm	N/A
46	7	SK Intellectual Property Law Firm	View
47	7	YUASA AND HARA	View
48	7	BUNA Patent Attorneys	View
49	7	KOUSHIN INTERNATIONAL PATENT FIRM	View
50	7	Yoshimiya 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, Adhesive material 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.