<2017-All> Firm Ranking of the number of Japanese granted patents in the Sound field in 2017

2019-01-28 2019-04-28

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

Technical field: Sound (digital audio processing, tuning device, speech processing, voice search, noise cancellation, microphone, piano, electronic instrument, etc.)
Status: Japanese granted patents in 2017 (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	101	ITOH International Patent Office	View
2	83	SHIGA International Patent Office	View
3	75	NAKAO & ASSOCIATES	View
4	50	SUZUYE & SUZUYE Intellectual Property Law	View
5	36	Sakai International Patent Office	View
6	35	Ogawa International Patent Firm	None
7	34	OHCHI INTERNATIONAL IP	View
8	28	Kashima & Associates	View
9	26	Prospec Patents & Trademarks	View
10	25	CHUO INTERNATIONAL PATENT FIRM	View
11	25	Asahi Patent Firm	View
12	25	SEIWA PATENT & LAW	View
13	24	TAIYO, NAKAJIMA & KATO	View
14	23	Ohtsuka Patent Office	View
15	22	Minami International Patent Firm	None
16	22	Nagoya International Patent Firm	View
17	22	Isshiki & Co.	View
18	17	Yoshida & Wakabayashi IP Firm	View
19	16	Sanno Patent Office	View
20	16	Matsuyama Patent Firm	None
21	16	SUGIMURA & Partners	View
22	15	Tsutsui Patent Firm	None
23	15	SHUSAKU・YAMAMOTO	View
24	14	Matsumoto Patent Firm	None
25	14	Soei Patent & Law Firm	View
26	14	Osuga & Associates	View
27	14	Aoyama & Partners	View
28	13	Okada Patent Firm	View
29	12	Shobayashi International Patent &Trademark Office	View
30	12	In-house patent attorney	－

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, Sound 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.