<2017-JP> Firm Ranking of the number of Japanese granted patents in the Pigment/Dye field in 2017

2019-01-15 2019-04-28

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

Technical field: Pigment/Dye (inkjet technology, colored composition, color filter, etc.)
Status: Japanese granted patents in 2017 (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	Website
1	39	In-house patent attorney	－
2	28	SIKs & Co.	View
3	23	Yoshida & Kondo	None
4	19	In-house patent attorney	－
5	18	Tsujimaru International Patent Office	View
6	16	TAIYO, NAKAJIMA & KATO	View
7	15	Ohtani Patent Office	View
8	15	Miyoshi & Miyoshi	View
9	14	Koh-Ei Patent Firm, P.C.	View
10	12	Gyoen Patent Firm	View
11	12	Tokyo Central Patent Firm	View
12	11	I.F. PARTNERS Patent Attorneys	View
13	11	Hirota, Nagare & Associates	View
14	10	SHIGA International Patent Office	View
15	9	Eikoh Patent Firm, P.C.	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, Pigment/Dye 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.