Company Filing History:

6 out of 696

Seikosha Co., Ltd.

Years Active: 1990-1999

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10 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5997188 - Plane shutter (1999-12-07),

2. 5826124 - Focal plane shutter (1998-10-20),

3. 5719663 - Range finder apparatus (1998-02-17),

4. 5608488 - Data processing device for a camera (1997-03-04),

5. 5559569 - Motor driven shutter having focus adjusting and stop setting means (1996-09-24),

6. 5420660 - Motor driven shutter activated by single motor having controllable (1995-05-30),

7. 5198849 - Remote controller for a camera (1993-03-30),

8. 5032859 - Shutter with lens drive mechanism (1991-07-16),

9. 4985724 - Automatic focus/exposure operation apparatus for camera (1991-01-15),

10. 4937603 - Multiple exposure photographic device for camera (1990-06-26),

Title: Toshiaki Hirai: Innovator in Focal Plane Shutter Technology

Introduction

Toshiaki Hirai is a notable inventor based in Yotsukaido, Japan. He has made significant contributions to the field of camera technology, particularly in the development of focal plane shutters. With a total of 10 patents to his name, Hirai's innovations have advanced the functionality and efficiency of photographic equipment.

Latest Patents

Hirai's latest patents include innovative designs for focal plane shutters. One of his patents describes a focal plane shutter that features a base plate with a shutter opening, along with opening and closing sector groups that consist of multiple sectors. This design incorporates a parallel link mechanism, where each sector is connected by arms pivotally supported on the base plate. The connecting pins are designed with tapered portions or flanges to ensure smooth operation, preventing any hindrance when sectors are interposed. Another patent outlines a similar focal plane shutter, which includes an intermediate sector that facilitates the smooth displacement of sectors relative to the shutter opening, ensuring unobstructed functionality.

Career Highlights

Throughout his career, Toshiaki Hirai has worked with prominent companies in the industry, including Seikosha Co., Ltd. and Seiko Precision Inc. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in shutter technology.

Collaborations

Hirai has collaborated with talented individuals in his field, including Kazuo Akimoto and Atsushi Takami. These partnerships have fostered innovation and have played a crucial role in the development of his patented technologies.

Conclusion

Toshiaki Hirai's contributions to the field of focal plane shutter technology have made a lasting impact on the photography industry. His innovative designs and collaborative efforts continue to inspire advancements in camera technology.

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