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Ozen Corporation

USPTO Granted Patents = 44

Forward Citations = 171

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12 inventors (with patents filed for the assignee):

Eishi Koike (32 out of 34 patents)

Katsumi Watanabe (5 out of 21 patents)

Masumi Kaneko (3 out of 3 patents)

4. Yasuhiko Yusa (2 out of 2 patents)

5. Seiji Ohata (2 out of 2 patents)

6. Yasushi Ohtani (2 out of 2 patents)

7. Bungo Hasegawa (2 out of 2 patents)

8. Yutaka Shiseki (1 out of 4 patents)

9. Daniel Hager (1 out of 1 patent)

10. Eishi Koiki (1 out of 1 patent)

11. Kazumi Nozawa (1 out of 2 patents)

12. Katsumi Watanabe, Deceased (1 out of 1 patent)

Core Competencies:

Sound Reproduction

Phonograph

Acoustic Playback

Record Player

Vibration Plate

Shock Responsive

Electric Motor

Spring Driven

Toy Mechanisms

Index Carrier

Simplified Design

Injection Moulding

44 patents: Sort by Forward Citations

1. 5247511 - Compact sound record playing apparatus (1993-09-21),

2. 5195919 - Panel piece combination toy (1993-03-23),

3. 5177733 - Sound recording playing apparatus with improved vibration plate (1993-01-05),

4. 5164927 - Compact record player having downwardly extending notched rib and (1992-11-17),

5. 5138602 - Sound record playing apparatus having shock responsive weight member to (1992-08-11),

6. 5103442 - Simplified acoustic playback apparatus (1992-04-07),

7. 5054012 - Sound reproducing device for playing a record disc having a plurality of (1991-10-01),

8. 4876678 - Sound reproducing device for playing a record disc having a plurality of (1989-10-24),

9. 4862444 - Index carrier for indexing and reproducing a plurality of record discs (1989-08-29),

10. 4827465 - Simplified sound reproducing device having a means for preventing (1989-05-02),

11. 4823332 - Simplified sound reproducing device capable of reproducing a plurality (1989-04-18),

12. 4811322 - Phonograph for a record disk having a plurality of sound grooves (1989-03-07),

13. 4801880 - Device for measuring the speed of a moving object (1989-01-31),

14. 4800305 - Pull string mechanism in a pull string type sound reproducing device (1989-01-24),

15. 4757491 - Sound generating toy (1988-07-12),

Company Overview

Ozen Corporation, based in Tokyo, Japan, specializes in the development and manufacturing of sound reproducing devices and phonograph technology. The company focuses on innovative acoustic playback apparatuses, including compact record players and both electric and spring-driven phonographs. Additionally, Ozen is involved in the production of toy sound generating devices and the injection molding of plastic parts, showcasing its expertise in both audio technology and manufacturing processes.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

44 Patents

#866 in Tokyo

#1,865 in Japan

#15,768 in the World

Ozen Corporation

Forward Citations = 171

12 inventors:

Eishi Koike (32 out of 34 patents)

Katsumi Watanabe (5 out of 21 patents)

Masumi Kaneko (3 out of 3 patents)

4. Yasuhiko Yusa (2 out of 2 patents)

5. Seiji Ohata (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ozen Corporation. Retrieved from https://idiyas.com/company/ozen

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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