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For the Inventor, By the Inventor

JP

D + M Holdings Inc.


USPTO Granted Patents = 73


Trademarks = 19

Forward Citations = 627

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69 inventors (with patents filed for the assignee):

goldMedal Nicholas J Murrells (8 out of 12 patents)

silverMedal Martin Richard Wachter (7 out of 7 patents)

bronzeMedal Brendon Stead (6 out of 6 patents)

4.  Katsuyoshi Takeno (6 out of 6 patents)

5.  Shunichi Tani (4 out of 4 patents)

6.  Peter Celinski (3 out of 12 patents)

7.  Anders Brogestam (3 out of 3 patents)

8.  Max Gordon Ramsay (3 out of 10 patents)

9.  Yoshinari Fukushima (3 out of 3 patents)

10.  Kazuhiro Onizuka (3 out of 3 patents)

11.  Syunji Usui (3 out of 3 patents)

12.  Yoshiharu Imahama (3 out of 3 patents)

13.  Reiko Ito (3 out of 3 patents)

14.  Sho Kodama (2 out of 39 patents)

15.  Christopher Commons (2 out of 5 patents)


Core Competencies:
Audio Device
Wireless Audio System
Multi-Channel Audio
Text-To-Speech
Signal Processing
Networked Media Systems
Voice Authentication
Audio Amplifier
Earphone Device
Media Playback
Proximity Detection
Content Data Transmission

73 patents:

1. 12445778 - AV amplifier (2025-10-14),
2. 12436730 - Audio device (2025-10-07),
3. 12375541 - System and method for synchronizing networked rendering devices (2025-07-29),
4. 12356160 - Multi-channel audio system, multi-channel audio device, program, and multi-channel audio playback method (2025-07-08),
5. 12342147 - Audio device, audio system, and computer-readable program (2025-06-24),
6. 12245009 - Wireless audio system, wireless speaker, and group joining method for wireless speaker (2025-03-04),
7. 12231873 - Operation terminal, audio device, audio system, and computer-readable program (2025-02-18),
8. 12212913 - Earphone device (2025-01-28),
9. 12170881 - Multichannel audio system, acoustic profile information generating device, wireless recording playback device, program, and method for generating acoustic profile information (2024-12-17),
10. 12020686 - System providing expressive and emotive text-to-speech (2024-06-25),
11. 11902616 - Audio-visual device (2024-02-13),
12. 11792574 - AV amplifier (2023-10-17),
13. 11381958 - Remote system configuration using audio ports (2022-07-05),
14. 11315561 - Audio device and computer readable program (2022-04-26),
15. RE48946 - Systems and methods for providing a media playback in a networked environment (2022-02-21),
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USPTO Data Jan 1 1976 - Dec 9 2025

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73 Patents

#50 in

#1,332 in Japan

#9,816 in the World

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JP

D + M Holdings Inc.

Forward Citations = 627

69 inventors:

goldMedal Nicholas J Murrells (8 out of 12 patents)

silverMedal Martin Richard Wachter (7 out of 7 patents)

bronzeMedal Brendon Stead (6 out of 6 patents)

4.  Katsuyoshi Takeno (6 out of 6 patents)

5.  Shunichi Tani (4 out of 4 patents)

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