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For the Inventor, By the Inventor

Tokyo, Japan

Hitachi Device Eng. Co., Ltd.

Calculating rank
USPTO Granted Patents = 6

Forward Citations = 124

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20 inventors (with patents filed for the assignee):

goldMedal Akira Endo (1 out of 116 patents)

silverMedal Kiichirou Kubo (1 out of 5 patents)

bronzeMedal Yoshiaki Takahashi (1 out of 43 patents)

4.  Shigemi Hirasawa (1 out of 38 patents)

5.  Teruaki Odaka (1 out of 6 patents)

6.  Ikuo Yamato (1 out of 11 patents)

7.  Norikazu Tokunaga (1 out of 32 patents)

8.  Shoichi Wakita (1 out of 5 patents)

9.  Hisao Amano (1 out of 15 patents)

10.  June Sugiura (1 out of 18 patents)

11.  Hisao Katto (1 out of 19 patents)

12.  Yuji Arakawa (1 out of 4 patents)

13.  Yoshiharu Takeuchi (1 out of 4 patents)

14.  Nozomi Horino (1 out of 6 patents)

15.  Seiji Kitakaze (1 out of 5 patents)


6 patents:

1. 4857795 - Internal magnetic shield support apparatus for color picture tube (1989-08-15),
2. 4826297 - Liquid crystal display device having an extention metal film wiring (1989-05-02),
3. 4825120 - Electron gun apparatus with auxiliary electrodes for a color cathode-ray (1989-04-25),
4. 4777575 - Switching power supply (1988-10-11),
5. 4742272 - Magnetron (1988-05-03),
6. 4731642 - Semiconductor memory device with means to prevent word line breakage (1988-03-15),
Company Overview
Hitachi Device Engineering Co., Ltd. is a leading provider of advanced device solutions, specializing in semiconductors, displays, and optoelectronics. With a commitment to technological innovation, Hitachi Device Engineering delivers high-quality products that meet the evolving needs of the market.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

6 Patents

#2,469 in Tokyo

#5,990 in Japan

Tokyo, JP
Tokyo, Japan

Hitachi Device Eng. Co., Ltd.

Forward Citations = 124

20 inventors:

goldMedal Akira Endo (1 out of 116 patents)

silverMedal Kiichirou Kubo (1 out of 5 patents)

bronzeMedal Yoshiaki Takahashi (1 out of 43 patents)

4.  Shigemi Hirasawa (1 out of 38 patents)

5.  Teruaki Odaka (1 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Device Eng. Co., Ltd.. Retrieved from https://idiyas.com/company/hitachi-device-eng-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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