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For the Inventor, By the Inventor

Hanno, Japan

Yasuaki Nakayama

This inventor holds 10 USPTO granted patents. Top assignee: Citizen Watch Company, Ltd.. Active years: 1976-1985.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasuaki Nakayama. Retrieved from https://idiyas.com/inventor/yasuaki-nakayama

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

USPTO Granted Patents = 10

% Patents Active = 100.0

Average Co-Inventor Count = 1.5

ph-index = 6

Forward Citations = 114(Granted Patents)


Location History:

  • Higashi-kurume, JA (1976)
  • Higashikurume, J (1976)
  • Hanno, JA (1978)
  • Hanno, JP (1979 - 1981)
  • Tanashi, JP (1985)

Company Filing History:

goldMedal10 out of 2,004 
 
Citizen Watch Company, Ltd.
 patents

Years Active: 1976-1985

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10 patents (USPTO):Explore Patents
1. 4526476 - Correction system for hands display type of electronic timepiece (1985-07-02),
2. 4296488 - Watch movement construction (1981-10-20),
3. 4243329 - Watch movement construction (1981-01-06),
4. 4224387 - Battery construction (1980-09-23),
5. 4201040 - Watch movement construction (1980-05-06),
6. 4186551 - Electronic timepiece structure (1980-02-05),
7. 4150538 - Dial attaching device for watch (1979-04-24),
8. 4095129 - Rotor assembly for electro-mechanical transducer of electronic timepiece (1978-06-13),
9. 3998044 - Electronic timepiece (1976-12-21),
10. 3935701 - Wristwatch with a time display control switch means (1976-02-03),

Title: Yasuaki Nakayama: Innovator in Timepiece Technology

Introduction

Yasuaki Nakayama is a prominent inventor based in Hanno, Japan. He has made significant contributions to the field of electronic timepieces, holding a total of 10 patents. His innovative designs and systems have enhanced the functionality and user experience of wristwatches.

Latest Patents

One of Nakayama's latest patents is a correction system for hands display type of electronic timepiece. This system allows for the display of multiple types of time information, such as alarm time and current time, using a single set of hands. The changeover between different types of information is achieved through rapid rotation of the hands. Notably, the system includes features that inhibit the input of correction signals from external switch actuations during the changeover process, effectively eliminating errors caused by accidental switch activations. Another significant patent is for a movement construction of a thin quartz wristwatch. This innovative design features a movement thickness of less than 2.5 mm, utilizing a flat coil as the driving coil of a stepping motor, with a wheel train arranged in an approximate concentric relationship with the coil.

Career Highlights

Yasuaki Nakayama is currently employed at Citizen Watch Company, Ltd., a leading manufacturer in the watch industry. His work has been instrumental in advancing the technology behind electronic timepieces, making them more efficient and user-friendly.

Collaborations

Throughout his career, Nakayama has collaborated with notable colleagues, including Masamichi Yamauchi and Makoto Yoshida. These partnerships have fostered innovation and creativity in the development of new timepiece technologies.

Conclusion

Yasuaki Nakayama's contributions to the field of electronic timepieces are noteworthy. His innovative patents and collaborative efforts have significantly impacted the watch industry, showcasing his expertise and dedication to advancing timekeeping technology.

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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