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Kanagawa, Japan

Nec Compound Semiconductor Devices, Ltd.

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USPTO Granted Patents = 60

% Expired Patents = 41.7

Forward Citations = 451

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77 inventors (with patents filed for the assignee):

Hidenori Shimawaki (5 out of 14 patents)

Toshimichi Kurihara (4 out of 5 patents)

Yoshikazu Nishimura (4 out of 11 patents)

4. Takaki Niwa (3 out of 7 patents)

5. Yosuke Miyoshi (3 out of 11 patents)

6. Fuminobu Ono (3 out of 4 patents)

7. Masahiro Tanomura (2 out of 23 patents)

8. Makoto Sakaguchi (2 out of 8 patents)

9. Koki Hirasawa (2 out of 22 patents)

10. Naoto Kurosawa (2 out of 5 patents)

11. Kouzi Hayasi (2 out of 3 patents)

12. Takashi Ueda (2 out of 18 patents)

13. Fumio Harima (2 out of 2 patents)

14. Shigeki Tsubaki (2 out of 2 patents)

15. Tetsu Toda (2 out of 2 patents)

Core Competencies:

Semiconductor Device

Photocurrent Conversion

High-Frequency Circuit

Laser Diode

Bipolar Transistor

Amplifier Circuit

Heterojunction Bipolar Transistor

Resin Sealing

Optical Semiconductor

MOS Transistor

Frequency Synthesizer

Field Effect Transistor

60 patents: Sort by Forward Citations

1. 7304333 - Semiconductor device (2007-12-04),

2. 7060530 - Semiconductor package having a resin cap member (2006-06-13),

3. 7045762 - Photocurrent-to-voltage conversion apparatus including non-diode-connected clamping MOS transistor (2006-05-16),

4. 7038244 - Semiconductor device and method of manufacturing the same (2006-05-02),

5. 7023283 - Wide lock range phase locked loop and method of operation (2006-04-04),

6. 7004325 - Resin-molded package with cavity structure (2006-02-28),

7. 7002803 - Electronic product with heat radiating plate (2006-02-21),

8. 6999746 - Image rejection mixer (2006-02-14),

9. 6972488 - Semiconductor device in which a semiconductor chip mounted on a printed circuit is sealed with a molded resin (2005-12-06),

10. 6960754 - Photoelectric current and voltage converting circuit (2005-11-01),

11. 6956195 - Photoelectric current and voltage converting circuit (2005-10-18),

12. 6956167 - Lid-holding frame used in production of hollow-package type electronic products, and sealing-process using such lid-holding frame (2005-10-18),

13. 6924201 - Heterojunction bipolar transistor and method of producing the same (2005-08-02),

14. 6905262 - Semiconductor device for optically coupling semiconductor light-emitting device to optical fiber (2005-06-14),

15. 6897547 - Semiconductor device including bipolar junction transistor, and production method therefor (2005-05-24),

Company Overview

Nec Compound Semiconductor Devices, Ltd. is a prominent player in the semiconductor industry, specializing in the development and manufacturing of advanced semiconductor devices. The company focuses on key technology areas such as photocurrent conversion, high-frequency circuits, and laser diodes. With expertise in bipolar transistors and amplifier circuits, it also innovates in heterojunction bipolar transistors and resin sealing technologies. Headquartered in Kanagawa, Japan, the company is committed to advancing semiconductor solutions for various applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

60 Patents

#57 in Kanagawa

#1,534 in Japan

#12,098 in the World

Kanagawa, Japan

Nec Compound Semiconductor Devices, Ltd.

Forward Citations = 451

77 inventors:

Hidenori Shimawaki (5 out of 14 patents)

Toshimichi Kurihara (4 out of 5 patents)

Yoshikazu Nishimura (4 out of 11 patents)

4. Takaki Niwa (3 out of 7 patents)

5. Yosuke Miyoshi (3 out of 11 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nec Compound Semiconductor Devices, Ltd.. Retrieved from https://idiyas.com/company/nec-compound-semiconductor-devices

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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