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Sansui Electric Co., Ltd.

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USPTO Granted Patents = 71

Trademarks = 2

Forward Citations = 985

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38 inventors (with patents filed for the assignee):

Susumu Takahashi (16 out of 129 patents)

Hirotaka Kurata (6 out of 10 patents)

Yoshinobu Asai (6 out of 6 patents)

4. Fumio Kobayashi (5 out of 13 patents)

5. Kazuhito Ohtomo (5 out of 5 patents)

6. Susumu Tanaka (4 out of 17 patents)

7. Ryosuke Ito (4 out of 4 patents)

8. Akira Kato (4 out of 5 patents)

9. Takaaki Yamamoto (3 out of 4 patents)

10. Hiroshi Iida (3 out of 8 patents)

11. Masao Suzuki (3 out of 105 patents)

12. Yuji Ikeda (2 out of 13 patents)

13. Yasuhiro Fujimoto (2 out of 9 patents)

14. Hiroshi Tabata (2 out of 5 patents)

15. Naokatsu Sugiura (2 out of 2 patents)

Core Competencies:

Speaker Design

PCM Transmission

Amplifier Circuits

Stereo Signal Demodulator

Noise Reduction

Record Player

Loudspeaker Device

Magnetic Tape

Frequency Synthesizer

Control Knob

Power Amplifier

Brushless DC Motors

71 patents: Sort by Forward Citations

1. 5206466 - Diaphragm for speaker (1993-04-27),

2. 4759038 - PCM transmission system (1988-07-19),

3. 4716590 - AM stereo transmission method and apparatus (1987-12-29),

4. 4633483 - Near-instantaneous companding PCM involving accumulation of less (1986-12-30),

5. 4626936 - Relative velocity control device for magnetic recording and reproducing (1986-12-02),

6. 4585952 - Digital waveform shaping circuit (1986-04-29),

7. 4580278 - Read clock producing system (1986-04-01),

8. 4546394 - Signal reconstruction circuit for digital signals (1985-10-08),

9. 4517528 - Amplifier circuit driven by ground isolated power supply (1985-05-14),

10. 4475185 - Record player with vibration cancellation mechanism (1984-10-02),

11. 4425638 - Dual turntable record player with torque cancellation (1984-01-10),

12. 4401951 - Bias circuit for use in a single-ended push-pull circuit (1983-08-30),

13. 4367442 - Distortion correction circuit for a power amplifier (1983-01-04),

14. 4282401 - System for transmission and reception of discrete four channel stereo (1981-08-04),

15. 4229705 - Differential amplifiers (1980-10-21),

Company Overview

Sansui Electric Co., Ltd., based in Tokyo, Japan, specializes in audio technology, focusing on the development and manufacturing of high-fidelity sound equipment. The company is renowned for its innovations in speaker design, amplifier circuits, and noise reduction technologies, catering to audiophiles and general consumers alike. With a strong emphasis on quality sound reproduction, Sansui also explores areas such as PCM transmission and stereo signal demodulation, contributing significantly to the evolution of audio devices and systems.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

71 Patents

#668 in Tokyo

#1,403 in Japan

#10,523 in the World

Sansui Electric Co., Ltd.

Forward Citations = 985

38 inventors:

Susumu Takahashi (16 out of 129 patents)

Hirotaka Kurata (6 out of 10 patents)

Yoshinobu Asai (6 out of 6 patents)

4. Fumio Kobayashi (5 out of 13 patents)

5. Kazuhito Ohtomo (5 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sansui Electric Co., Ltd.. Retrieved from https://idiyas.com/company/sansui-electric-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]

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