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

2019-03-26 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 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	101	SHIGA International Patent Office	View
2	89	ITOH International Patent Office	View
3	73	NAKAO & ASSOCIATES	View
4	53	Sakai International Patent Office	View
5	44	SUZUYE & SUZUYE Intellectual Property Law	View
6	35	Kashima & Associates	View
7	30	OHCHI INTERNATIONAL IP	View
8	26	Nagoya International Patent Firm	View
9	25	Minami International Patent Firm	None
10	24	Osuga & Associates	View
11	22	CHUO INTERNATIONAL PATENT FIRM	View
12	20	Prospec Patents & Trademarks	View
13	20	Sanno Patent Office	View
14	19	Shobayashi International Patent &Trademark Office	View
15	18	Okada Patent Firm	View
16	18	Ohtsuka Patent Office	View
17	16	Aoyama & Partners	View
18	15	HARAKENZO WORLD PATENT & TRADEMARK	View
19	14	Ogawa International Patent Firm	None
20	14	In-house patent attorney	－
21	14	Intect International Patent Office	View
22	13	Miyoshi & Miyoshi	View
23	13	TMI Associates	View
24	13	Yoshida & Wakabayashi IP Firm	View
25	13	Takahashi Patent Firm	None
26	12	SEIWA PATENT & LAW	View
27	12	TAIYO, NAKAJIMA & KATO	View
28	12	Tsutsui Patent Firm	None
29	12	In-house patent attorney	－
30	11	NII Patent 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, 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.