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: Foreign (i.e., patents with claiming priority of a foreign application, or patents based on PCT application whose receiving office is not 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 | 94 | ITOH International Patent Office | View |
| 2 | 49 | SHIGA International Patent Office | View |
| 3 | 34 | SUZUYE & SUZUYE Intellectual Property Law | View |
| 4 | 16 | Matsuyama Patent Firm | None |
| 5 | 15 | Tsutsui Patent Firm | None |
| 6 | 15 | Ohtsuka Patent Office | View |
| 7 | 15 | SHUSAKU・YAMAMOTO | View |
| 8 | 13 | Okada Patent Firm (Masahiro OKADA) | View |
| 9 | 13 | Aoyama & Partners | View |
| 10 | 10 | SEIWA PATENT & LAW | View |
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.
