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For the Inventor, By the Inventor

Osaka, Japan

Izumi Denki Corporation


USPTO Granted Patents = 16

Forward Citations = 267

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14 inventors (with patents filed for the assignee):

goldMedal Teizo Fujita (15 out of 23 patents)

silverMedal Toshio Koizumi (2 out of 2 patents)

bronzeMedal Haruo Kimura (2 out of 2 patents)

4.  Syunzo Yoshida (2 out of 2 patents)

5.  Michio Hirabayashi (1 out of 7 patents)

6.  Tosiro Ohashi (1 out of 2 patents)

7.  Shunzo Yoshida (1 out of 1 patent)

8.  Harumi Fujisato (1 out of 1 patent)

9.  Toyokazu Ikebata (1 out of 1 patent)

10.  Kouji Takimoto (1 out of 1 patent)

11.  Masaharu Yoshino (1 out of 1 patent)

12.  Hidetaka Dohmoto (1 out of 1 patent)

13.  Shigeru Toyoda (1 out of 1 patent)

14.  Toshiro Ohashi (1 out of 4 patents)


16 patents:

1. 4630183 - Light emitting diode lamp and method for producing thereof (1986-12-16),
2. 4499352 - Adapter for mounting switch onto panel (1985-02-12),
3. 4427863 - Small-sized relay and method for fabricating the same (1984-01-24),
4. 4371922 - Process stepping sequential controller (1983-02-01),
5. 4315123 - Switching apparatus assembly structure (1982-02-09),
6. 4276631 - Electronic timer (1981-06-30),
7. 4246840 - Printing machine for printing on a three-dimensional article (1981-01-27),
8. 4227162 - Electromagnet relay with specific housing structure (1980-10-07),
9. 4220808 - Mounting device for compact apparatus (1980-09-02),
10. D255350 - Timing relay (1980-06-10),
11. 4157463 - Switch apparatus (1979-06-05),
12. D251840 - Single pole power relay (1979-05-15),
13. D250184 - Pneumatic timing relay or similar article (1978-11-07),
14. 4104602 - Pneumatic timer (1978-08-01),
15. 4080583 - Electrical motor-driven timer (1978-03-21),
Company Overview
Izumi Denki Corporation, based in Osaka, Japan, specializes in the development and manufacturing of advanced electrical equipment and systems. The company focuses on providing innovative solutions in the fields of power generation, distribution, and control technologies. With a commitment to enhancing energy efficiency and sustainability, Izumi Denki plays a significant role in supporting various industries through its cutting-edge products and research initiatives, contributing to the advancement of electrical engineering and technology.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

16 Patents

#362 in Osaka

#3,339 in Japan

#37,831 in the World

Osaka, JP
Osaka, Japan

Izumi Denki Corporation

Forward Citations = 267

14 inventors:

goldMedal Teizo Fujita (15 out of 23 patents)

silverMedal Toshio Koizumi (2 out of 2 patents)

bronzeMedal Haruo Kimura (2 out of 2 patents)

4.  Syunzo Yoshida (2 out of 2 patents)

5.  Michio Hirabayashi (1 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Izumi Denki Corporation. Retrieved from https://idiyas.com/company/izumi-denki

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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