<2018-All> Firm Ranking of the number of Japanese granted patents in the Adhesive material field in 2018

2019-03-03 2019-04-28

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 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	130	SHIGA International Patent Office	View
2	67	Unius Patent Attorneys Office	View
3	60	Soei Patent & Law Firm	View
4	43	SANSUI PATENT FIRM	View
5	39	YASUTOMI & Associates	View
6	39	Ohtani Patent Office	View
7	33	In-house patent attorney	－
8	32	Miyazaki & Metsugi	View
9	28	TAIYO, NAKAJIMA & KATO	View
10	25	SEIWA PATENT & LAW	View
11	24	Trust International Patent Office	View
12	23	Aoyama & Partners	View
13	22	MOMII & ASSOCIATES	View
14	21	SIKs & Co.	View
15	19	GOTO & CO.	View
16	17	SSINPAT PATENT FIRM	View
17	17	In-house patent attorney	－
18	17	SENDA PATENT BUREAU	View
19	17	Sonderhoff & Einsel	View
20	16	Esaki & 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, 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.