Kawasaki, Japan

Yoshiaki Ohtsubo

This inventor holds 27 USPTO granted patents, primarily in Camera Technology. Top assignees: Nippon Kogaku K.k., Nikon Corporation. Active years: 1978-1995.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshiaki Ohtsubo. Retrieved from https://idiyas.com/inventor/yoshiaki-ohtsubo

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


% Patents Active = 100.0

Average Co-Inventor Count = 2.9

ph-index = 8

Forward Citations = 214(Granted Patents)


Location History:

  • Kawasaki, JA (1978)
  • Kawasaki, JP (1978 - 1985)
  • Inba, JP (1991)
  • Chiba, JP (1991 - 1993)
  • Yokohama, JP (1989 - 1994)
  • Ichikawa, JP (1995)

Company Filing History:


Years Active: 1978-1995

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Areas of Expertise:
Camera
Flash Control
Auto-Focus
Distance Measuring
Shutter Control
Power Supply Circuit
Exposure Parameter
Self-Timer
Alarm Device
Electronic Flash
Temperature Compensation
Signal Transmitting
27 patents (USPTO):Explore Patents

Title: **Innovative Contributions of Yoshiaki Ohtsubo: A Pioneer in Camera Technology**

Introduction

Yoshiaki Ohtsubo, a prolific inventor based in Kawasaki, Japan, is renowned for his significant contributions to the field of camera technology. With an impressive portfolio of 27 patents, Ohtsubo has developed innovative solutions that enhance photographic experiences for users worldwide. His work primarily revolves around improving the functionality and usability of automatic-focus cameras, making strides in preventing common issues such as red-eye effect.

Latest Patents

Among his latest innovations, Ohtsubo holds a patent for a control device aimed at preventing the red-eye effect in cameras. This groundbreaking technology utilizes an electronic flash device that operates in sync with exposure, enabling pre-light-emission to reduce pupil size before the main flash occurs. This intelligent design not only enhances image quality but also elevates the overall user experience during photo sessions.

Another notable patent is for an operation control device for automatic-focus cameras. This invention includes a focus lock system that maintains focus on subjects throughout multiple exposures. Additionally, the design incorporates a self-timer and an automatic exposure system with various program modes, ensuring versatility for users in different shooting conditions.

Career Highlights

Ohtsubo’s career has been marked by significant roles in prominent companies such as Nippon Kogaku K.K. and Nikon Corporation. His tenure at these organizations has allowed him to collaborate on cutting-edge projects, further embedding his influence in the camera manufacturing industry. His innovative designs have not only gained recognition but have also set new standards for camera technology.

Collaborations

During his career, Ohtsubo has worked closely with esteemed colleagues, including Sakuji Watanabe and Tatsuo Amanuma. These collaborations have played a role in enhancing the quality and impact of their inventions, benefiting from the sharing of knowledge and expertise that each member brought to their projects.

Conclusion

Yoshiaki Ohtsubo's inventive spirit and dedication to improving photographic technology continue to leave a lasting impact in the world of cameras. His notable patents demonstrate his commitment to innovation, significantly advancing the user experience in photography. As the industry evolves, the contributions of inventors like Ohtsubo will undoubtedly inspire future generations of innovators.

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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