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

2022.09.27 2022.10.05

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

Technical field: Semiconductor (semiconductor chip, material, wafer, device, 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	162	Soei Patent & Law Firm	View
2	153	Patent Attorney's Office Yoshida, Yoshitake and Arita	View
3	150	Sakai International Patent Office	View
4	122	SHIGA International Patent Office	View
5	116	Fukami Patent Office, P.C.	View
6	111	Ai Association of Patent and Trademark Attorneys	View
7	99	HYUGAJI & Associates	View
8	94	TAIYO, NAKAJIMA & KATO	View
9	90	TSUTSUI & ASSOCIATES	View
10	89	ITOH International Patent Office	View
11	85	RYUKA IP LAW FIRM	View
12	77	A.SAKAI & ASSOCIATES	View
13	76	Polaire Intellectual Property Corporation	View
14	66	PALMO Patent Firm	View
15	64	Kai-U Patent Law Firm	View
16	53	PRIMEWORKS IP Attorneys	View
17	52	HIBIKI IP LAW FIRM	View
18	52	TAKADA, TAKAHASHI & PARTNERS	View
19	52	KYOWA PATENT AND LAW OFFICE	View
20	47	Yoshimiya Patent Office	View
21	45	YUWA INTERNATIONAL PATENT FIRM	View
22	44	Aoyama & Partners	View
23	43	YOKOHAMA INTERNATIONAL PATENT LAW OFFICE	View
24	42	NII Patent Firm	View
25	41	NICHIEI Patent and Trademark Attorneys	View
26	40	Fuso Patent Firm	View
27	40	Sano Patent Office	View
28	35	Nishikawa & Associates	View
29	35	Yamakawa International Patent Office	View
30	32	Haruka Patent & Trademark Attorneys	View
31	32	Kyowey International	View
32	31	Prezio IP Firm	View
33	31	SATO & ASSOCIATES	View
34	30	Tsubasa patent professional corporation	View
35	29	MAEDA & PARTNERS	View
36	29	AICHI, Takahashi, Iwakura & Associates	View
37	28	SUGIMURA & Partners	View
38	28	Takahashi Hayashi and Partner Patent Attorneys inc.	View
39	28	Miyoshi & Miyoshi	View
40	27	YOU-I Patent Firm	View
41	27	Ohtsuka Patent Office	View
42	27	In-house patent attorney	－
43	26	ION PATENT	View
44	25	GOTO & CO.	View
45	25	OKUDA & ASSOCIATES	View
46	25	Matsuura & Associates	View
47	24	Eimei Patent Office	N/A
48	24	SUZUYE & SUZUYE Intellectual Property Law	View
49	23	Sugitani Patent Office	N/A
50	23	Okabe International 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, semiconductor 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.