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Denon, Ltd.

USPTO Granted Patents = 20

% Expired Patents = 10.0

Trademarks = 2

Forward Citations = 241

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21 inventors (with patents filed for the assignee):

Tadahiko Sakamoto (4 out of 6 patents)

Atsushi Ishibashi (2 out of 51 patents)

Masayuki Hori (2 out of 4 patents)

4. Kazuhisa Machida (2 out of 22 patents)

5. Tsugio Endou (2 out of 2 patents)

6. Hideki Ikeda (2 out of 2 patents)

7. Atsushi Oonishi (2 out of 2 patents)

8. Akihito Kimura (2 out of 2 patents)

9. Kouji Nakajima (1 out of 17 patents)

10. Mitsugi Fukushima (1 out of 2 patents)

11. Toshiyuki Kajigano (1 out of 2 patents)

12. Kiyoshi Kobiyama (1 out of 2 patents)

13. Keishi Matsunaga (1 out of 1 patent)

14. Jyoji Watanabe (1 out of 1 patent)

15. Kazuma Takenaka (1 out of 1 patent)

20 patents: Sort by Forward Citations

1. 7072882 - Apparatus for reproducing video, still images, audio and text from data based upon a processing order (2006-07-04),

2. 6985418 - Optical disk reproducing apparatus (2006-01-10),

3. 6973019 - Recording medium reproducing apparatus (2005-12-06),

4. 6967527 - Pulse width modulation amplifier (2005-11-22),

5. 6951024 - Optical disk reproducing apparatus and reproducing method (2005-09-27),

6. 6919771 - Digital amplifier (2005-07-19),

7. 6842417 - Audio system (2005-01-11),

8. 6816453 - Communication system using orthogonal frequency division multiplexed signal (2004-11-09),

9. D496922 - Digital audio disk player (2004-10-06),

10. 6791909 - Optical disc reproducing apparatus (2004-09-14),

11. 6771582 - Control dial and optical disk apparatus having the control dial (2004-08-03),

12. 6754150 - Contents data reproducing apparatus (2004-06-22),

13. 6680931 - Data multiplex broadcasting method, data multiplex broadcasting system, receiving device, and recording device (2004-01-20),

14. 6650600 - Digital audio disc recorder (2003-11-18),

15. 6600700 - Digital audio disc recorder (2003-07-29),

Company Overview

Denon, Ltd. is a prominent Japanese company specializing in high-fidelity audio equipment and home entertainment solutions. Renowned for its innovative designs, Denon develops a wide range of products including audio receivers, speakers, and headphones, catering to both consumer and professional markets. The company emphasizes advanced audio technologies, focusing on delivering superior sound quality and immersive experiences. With a commitment to excellence, Denon continues to influence the audio industry through its dedication to research and development.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

20 Patents

#1,343 in Tokyo

#2,944 in Japan

#31,233 in the World

Denon, Ltd.

Forward Citations = 241

21 inventors:

Tadahiko Sakamoto (4 out of 6 patents)

Atsushi Ishibashi (2 out of 51 patents)

Masayuki Hori (2 out of 4 patents)

4. Kazuhisa Machida (2 out of 22 patents)

5. Tsugio Endou (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Denon, Ltd.. Retrieved from https://idiyas.com/company/denon

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]

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