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Sankyo Electric Co., Ltd.

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USPTO Granted Patents = 35

Forward Citations = 551

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23 inventors (with patents filed for the assignee):

Masaharu Hiraga (12 out of 40 patents)

Kiyoshi Terauchi (9 out of 101 patents)

Shigemi Shimizu (3 out of 37 patents)

4. Ryohei Kondo (3 out of 3 patents)

5. Nobuaki Saegusa (3 out of 4 patents)

6. Isamu Shirai (2 out of 7 patents)

7. Masakatsu Sakaki (2 out of 7 patents)

8. Kunitake Hatori (2 out of 2 patents)

9. Katsunari Itagaki (2 out of 2 patents)

10. Hideki Yamauchi (1 out of 20 patents)

11. Tatsushi Ohyama (1 out of 23 patents)

12. Kiyoshi Miyazawa (1 out of 12 patents)

13. Hiroshi Toyoda (1 out of 1 patent)

14. Toshihiko Ozaki (1 out of 1 patent)

15. Ikuo Harashima (1 out of 1 patent)

Core Competencies:

Refrigerant Compressors

Electromagnetic Clutches

Scroll-Type Compressor

Temperature Control Circuit

Automatic Cooking Apparatus

Oil Separator

Lubrication System

Vending Machines

Fluid Suction Apparatus

Drive Shaft Seal

Multi-Cylinder Compressor

Scene Change Detection

35 patents: Sort by Forward Citations

1. 6977962 - Method and apparatus for decoding and coding images with scene change detection function (2005-12-20),

2. 4425520 - Reduced diameter devices with an electromagnetic clutch (1984-01-10),

3. 4340339 - Scroll type compressor with oil passageways through the housing (1982-07-20),

4. 4332535 - Scroll type compressor having an oil separator and oil sump in the (1982-06-01),

5. 4331068 - Control circuit for automatic cooking apparatus (1982-05-25),

6. 4326386 - Temperature control circuit for automobile air-conditioning system (1982-04-27),

7. 4325683 - Scroll-type compressor with rotation prevention and anti-deflection means (1982-04-20),

8. 4314796 - Scroll-type compressor with thrust bearing lubricating and bypass means (1982-02-09),

9. 4314472 - Method for producing a magnetic rotatable member for an electromagnetic (1982-02-09),

10. 4304535 - Scroll-type compressor units with minimum housing and scroll plate radii (1981-12-08),

11. 4303379 - Scroll-type compressor with reduced housing radius (1981-12-01),

12. 4301906 - Electromagnetic clutches (1981-11-24),

13. 4301716 - Refrigerant compressor units (1981-11-24),

14. 4290345 - Refrigerant compressors (1981-09-22),

15. 4287976 - Electromagnetic clutches (1981-09-08),

Company Overview

Sankyo Electric Co., Ltd. is a prominent manufacturer based in Isesaki, Japan, specializing in the development of advanced electronic components and systems. The company focuses on various sectors, including automotive electronics, industrial automation, and consumer electronics, leveraging innovative technologies to enhance performance and reliability. With a commitment to research and development, Sankyo Electric aims to deliver cutting-edge solutions that meet the evolving needs of its global clientele.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

35 Patents

#5 in Isesaki

#2,131 in Japan

#19,181 in the World

Sankyo Electric Co., Ltd.

Forward Citations = 551

23 inventors:

Masaharu Hiraga (12 out of 40 patents)

Kiyoshi Terauchi (9 out of 101 patents)

Shigemi Shimizu (3 out of 37 patents)

4. Ryohei Kondo (3 out of 3 patents)

5. Nobuaki Saegusa (3 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sankyo Electric Co., Ltd.. Retrieved from https://idiyas.com/company/sankyo-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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