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For the Inventor, By the Inventor

Kokubunji, Japan

Keiji Tsunoda

This inventor holds 25 USPTO granted patents, primarily in Digital Audio Technology. Top assignee: Teac Corporation. Active years: 1991-2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Tsunoda. Retrieved from https://idiyas.com/inventor/keiji-tsunoda

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

USPTO Granted Patents = 25

% Patents Active = 100.0

Average Co-Inventor Count = 3.9

ph-index = 12

Forward Citations = 327(Granted Patents)


Location History:

  • Kokubunji, JP (1991 - 1993)
  • Tokyo, JP (2001)
  • Musashino, JP (1995 - 2002)

Company Filing History:

goldMedal25 out of 1,030 
 
Teac Corporation
 patents

Years Active: 1991-2002

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Areas of Expertise:
Digital Audio Disc Player
Streaming Cassette Tape Drive
Audio Mixer
Combined Disk Drive
Magnetic Disc Memory
Digital Audio Tape Recorder
Optical Disc Player
Synchronization Controller
Combined Tape Player
Amplifier
Tuner
Air Cleaner
25 patents (USPTO):Explore Patents
1. D459336 - Combined radio receiver and digital audio disc player (2002-06-26),
2. D436596 - Magnetic disc memory (2001-01-24),
3. D434749 - Combined digital audio disc player, amplifier and tuner (2000-12-05),
4. D408408 - Digital audio disc player (1999-04-20),
5. D408407 - Digital audio disc player (1999-04-20),
6. D391571 - Optical disc player (1998-03-03),
7. D367052 - Combined audio mixer and tape recorder (1996-02-13),
8. D362666 - Digital audio tape recorder (1995-09-26),
9. D340716 - Digital audio disc player (1993-10-26),
10. D338671 - Streaming cassette tape drive (1993-08-24),
11. D338520 - Air cleaner (1993-08-17),
12. D337753 - Synchronization controller for electric machines (1993-07-27),
13. D331574 - Combined disk drive and streaming cassette tape drive (1992-12-08),
14. D325910 - Combined audio mixer and tape recorder (1992-05-05),
15. D325737 - Audio mixer (1992-04-28),

Title: The Innovative Contributions of Keiji Tsunoda

Introduction

Keiji Tsunoda, a prominent inventor based in Kokubunji, Japan, has made significant contributions to the field of electronics with a remarkable portfolio of 25 patents. His work primarily focuses on advancements in audio technology, showcasing his commitment to enhancing user experiences through innovative designs.

Latest Patents

Among his latest inventions, Tsunoda's patents include a combined radio receiver and digital audio disc player, which reflects the convergence of traditional and modern audio technologies. Additionally, he has developed magnetic disc memory systems, further pushing the boundaries of data storage solutions. These inventions not only demonstrate his expertise but also his ability to respond to the evolving demands of the tech industry.

Career Highlights

Tsunoda's professional journey has been largely associated with Teac Corporation, where he has consistently sought to innovate within the company’s product offerings. His skills and creativity have positioned him as a key figure in the development of cutting-edge audio equipment.

Collaborations

Throughout his career, Tsunoda has collaborated with talented colleagues such as Masafumi Ito and Shigeru Hasegawa. Their teamwork has fostered an environment of creativity and innovation, allowing them to combine their unique skills and insights to achieve remarkable advancements in technology.

Conclusion

Keiji Tsunoda's contributions to the field of electronics exemplify the spirit of innovation. With a strong portfolio of patents and collaborative efforts, he continues to play a pivotal role in advancing audio technology, making lasting impacts on the industry and consumers alike.

Profile summary based on public USPTO records.
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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