EPO Patents = 3

Trademarks = 3

Forward Citations = 8

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11 inventors (with patents filed for the assignee):

Katsuhiro Fujimoto (3 out of 3 patents)

Motohiro Hirao (3 out of 3 patents)

Masao Watanabe (2 out of 78 patents)

4. Tatsuo Nakahata (2 out of 41 patents)

5. Manabu Saito (2 out of 23 patents)

6. Toshihiko Kushida (2 out of 9 patents)

7. Yukio Torigai (2 out of 9 patents)

8. Tatsuo Hirai (2 out of 9 patents)

9. Akira Takenouchi (1 out of 1 patent)

10. Youichi Morisawa (1 out of 1 patent)

11. Yuki Sugiura (1 out of 9 patents)

12. Fujimoto Katsuhiro (0 patent)

6 patents: Sort by Forward Citations

1. 12246415 - Socket adapter for impact wrench (2025-03-11),

2. 12042909 - Electric power tools (2024-07-23),

3. D972903 - Adjustable wrench (2022-12-20),

4. 9776453 - Tightening device and tightening method (2017-10-03),

5. 9645026 - Tightening device (2017-05-09),

6. D769093 - Socket for wrench (2016-10-18),

Company Overview

Tone Co., Ltd. is a leading manufacturer of high-quality audio equipment. With a focus on innovation and cutting-edge technology, we strive to deliver exceptional sound experiences to our customers. From amplifiers to speakers, our products are designed to enhance music and entertainment in any environment.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

6 Patents

#651 in Osaka

#5,988 in Japan

Osaka, Japan

Tone Co., Ltd.

Forward Citations = 8

11 inventors:

Katsuhiro Fujimoto (3 out of 3 patents)

Motohiro Hirao (3 out of 3 patents)

Masao Watanabe (2 out of 78 patents)

4. Tatsuo Nakahata (2 out of 41 patents)

5. Manabu Saito (2 out of 23 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tone Co., Ltd.. Retrieved from https://idiyas.com/company/tone-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

3 patents (EPO):

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]