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For the Inventor, By the Inventor

Iruma, Japan

Yasuhiko Nishikubo

This inventor holds 14 USPTO granted patents. Top assignee: Citizen Watch Company, Ltd.. Active years: 1976-1985.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasuhiko Nishikubo. Retrieved from https://idiyas.com/inventor/yasuhiko-nishikubo

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank
USPTO Granted Patents = 14

% Patents Active = 100.0

Average Co-Inventor Count = 1.5

ph-index = 4

Forward Citations = 78(Granted Patents)


Location History:

  • Iruma, J (1976)
  • Tokyo, JA (1977)
  • Iruma, JA (1976 - 1978)
  • Iruma, JP (1981 - 1982)
  • Saitama, JP (1984)
  • Tokorozawa, JP (1982 - 1985)

Company Filing History:

goldMedal14 out of 2,004 
 
Citizen Watch Company, Ltd.
 patents

Years Active: 1976-1985

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14 patents (USPTO):Explore Patents
1. 4549818 - Temperature detector (1985-10-29),
2. 4430008 - Quartz oscillation-type electronic timepiece (1984-02-07),
3. 4388001 - Electronic timepiece (1983-06-14),
4. 4333171 - Electronic timepiece with diffusion resistor for compensating threshold (1982-06-01),
5. 4326277 - Electronic timepiece (1982-04-20),
6. 4320479 - Analogue electronic timepiece with an alarm device (1982-03-16),
7. 4296490 - Crystal oscillation-type electronic timepiece (1981-10-20),
8. 4293939 - Electronic timepiece having an alarm system (1981-10-06),
9. 4280210 - Electronic alarm timepiece (1981-07-21),
10. 4094139 - Display control circuit for electronic timepiece (1978-06-13),
11. 4006584 - Electronic timepiece (1977-02-08),
12. 3999370 - Temperature compensated electronic timepiece (1976-12-28),
13. 3939643 - Crystal-controlled electronic timepiece with CMOS switching and (1976-02-24),
14. 3938316 - Temperature compensated electronic timepiece (1976-02-17),

Title: Innovations of Yasuhiko Nishikubo

Introduction

Yasuhiko Nishikubo is a prominent inventor based in Iruma, Japan. He has made significant contributions to the field of electronics, holding a total of 13 patents. His work primarily focuses on developing innovative devices that enhance functionality and efficiency.

Latest Patents

Among his latest inventions is a temperature detector that utilizes a CMOS integrated circuit. This temperature detector features a first constant voltage circuit that produces a first constant voltage, a second constant voltage circuit that generates a second constant voltage, and a ring oscillator that outputs a voltage dependent on ambient temperature. Each constant voltage circuit includes a standard resistor in the form of a diffusion resistor, a current-mirror circuit for standard voltage generation, and a voltage follower. The ring oscillator is designed with a delay resistor formed by a MOS transistor. Another notable invention is a quartz oscillation-type electronic timepiece that operates on minimal electric power. This timepiece's electronic circuits function on a small constant voltage provided by a constant-voltage circuit, except for components that require a higher voltage, such as the display device unit.

Career Highlights

Yasuhiko Nishikubo is currently employed at Citizen Watch Company, Ltd., a leading manufacturer in the watch industry. His innovative designs and patents have significantly contributed to the company's reputation for quality and technological advancement.

Collaborations

Throughout his career, Nishikubo has collaborated with notable colleagues, including Mitsuo Sekine and Shigeru Morokawa. These partnerships have fostered a creative environment that encourages the development of groundbreaking technologies.

Conclusion

Yasuhiko Nishikubo's contributions to the field of electronics through his patents and innovations have made a lasting impact. His work continues to inspire advancements in technology and design.

Profile summary based on public USPTO records.
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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