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

2022.10.05 2022.10.05

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

Technical field: AI (artificial intelligence, machine learning, deep learning, 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, it was counted as being handled by the firm).

Ranking	No.	IP law firm	Web
1	241	Sakai International Patent Office	View
2	109	SHIGA International Patent Office	View
3	47	TAIYO, NAKAJIMA & KATO	View
4	46	ITOH International Patent Office	View
5	44	TMI Associates	View
6	38	SUNRISE PATENT OFFICE	View
7	38	SOCO IP LAW FIRM	View
8	38	International Patent Office Minoru	View
9	33	In-house patent attorney	－
10	30	Shobayashi International Patent &Trademark Office	View
11	29	TOU-OU PATENT FIRM	View
12	28	Fukami Patent Office, P.C.	View
13	25	AIWA International Patent Agency	View
14	24	NII Patent Firm	View
15	23	KOHNO & KOHNO	View
16	22	SUZUYE & SUZUYE Intellectual Property Law	View
17	22	NAKAO & ASSOCIATES	View
18	22	Seiryo Intellectual Property Corp.	View
19	21	IPTech	View
20	21	Sanno Patent Attorneys Office	View
21	21	Kyushu International Patent Office	View
22	20	Hayahara Patent & Engineering	View
23	20	Ohtsuka Patent Office	View
24	20	Soei Patent & Law Firm	View
25	19	Isono International Patent Office, P. C.	View
26	19	LEXIA PARTNERS	View
27	18	Haruka Patent & Trademark Attorneys	View
28	18	Willfort International Patent Firm	View
29	18	BRIGHTAS IP ATTORNEYS	View
30	17	HIBIKI IP LAW FIRM	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, AI 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.