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For the Inventor, By the Inventor

Osaka, Japan

Tetsuo Yamaoka

This inventor holds 12 USPTO granted patents. Top assignee: West Electric Co., Ltd.. Active years: 1978-1984.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tetsuo Yamaoka. Retrieved from https://idiyas.com/inventor/tetsuo-yamaoka

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

USPTO Granted Patents = 12

% Patents Active = 100.0

Average Co-Inventor Count = 2.0

ph-index = 7

Forward Citations = 91(Granted Patents)


Location History:

  • Osaka,, JP (1978)
  • Osaka, JA (1978)
  • Suita, JA (1978)
  • Osaka, JP (1978 - 1984)

Company Filing History:

goldMedal12 out of 145 
 
West Electric Co., Ltd.
 patents

Years Active: 1978-1984

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12 patents (USPTO):Explore Patents
1. 4479076 - Power saving device for electronic flash (1984-10-23),
2. 4372657 - Device for indicating photographic exposure conditions (1983-02-08),
3. 4352546 - Camera selectively settable to either standard photographic mode or (1982-10-05),
4. 4336985 - Camera with macro-photographic system (1982-06-29),
5. 4325621 - Electronic flash device (1982-04-20),
6. 4280760 - Flash camera (1981-07-28),
7. 4155029 - Auxiliary electronic flash apparatus (1979-05-15),
8. 4147420 - Flash camera (1979-04-03),
9. 4131351 - Battery checker for a camera with a flash light unit (1978-12-26),
10. 4119988 - Camera using instant print film (1978-10-10),
11. 4074287 - Flash and camera device (1978-02-14),
12. 4068150 - Voltage indication means for an electronic flashing device (1978-01-10),

Title: The Innovative Mind of Tetsuo Yamaoka

Introduction

Tetsuo Yamaoka, an esteemed inventor based in Osaka, Japan, has made significant contributions to the field of electronics through his innovative designs. With a total of 12 patents to his name, his work reflects a deep understanding of both technology and user experience.

Latest Patents

Among Yamaoka's most notable inventions is the "Power Saving Device for Electronic Flash." This device features an electronic switching element that activates when a pushbutton switch is closed, initiating a DC-DC converter. Notably, the fully electronic control system halts the switching element after a set time, effectively conserving power from a low-voltage source.

Another significant patent is his "Device for Indicating Photographic Exposure Conditions." This important device incorporates an electrooptic element into the finder system of a camera. It functions by rendering the viewfinder opaque under unsatisfactory exposure conditions, ensuring that photographers are aware of potential exposure issues before capturing images.

Career Highlights

Currently working at West Electric Co., Ltd., Yamaoka has established himself as an integral part of the company's innovation team. His inventive spirit and technical prowess have not only advanced the company’s product offerings but have also contributed to the broader electronics industry.

Collaborations

Tetsuo Yamaoka collaborates closely with fellow inventors Hiroshi Iwata and Akitoshi Morioka. Together, they form a dynamic team that continuously strives to push the boundaries of what is possible in electronic innovation.

Conclusion

Tetsuo Yamaoka's contributions to the field of electronics, highlighted by his recent patents, showcase his inventive flair and commitment to improvement. As he continues to innovate at West Electric Co., Ltd., the impact of his work on both the company and the industry as a whole remains profound.

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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