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For the Inventor, By the Inventor

Saitama-ken, Japan

Tsutomu Narisawa

USPTO Granted Patents = 14

Average Co-Inventor Count = 3.0

ph-index = 8

Forward Citations = 260(Granted Patents)


Location History:

  • Ohmiya, JP (1990)
  • Kitaadachigun, JP (1996 - 1997)
  • Saitama, JP (1994 - 1999)
  • Saitama-ken, JP (1996 - 2000)

Company Filing History:

goldMedal14 out of 8,889 
 
Nikon Corporation
 patents

Years Active: 1990-2000

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14 patents (USPTO):Explore Patents
1. 6148153 - Focus detection device and focus detection method (2000-11-14),
2. 5862419 - Camera capable of displaying brightness distribution (1999-01-19),
3. 5758201 - Camera having line of sight detecting device (1998-05-26),
4. 5749000 - Camera having voice-input device for changing focus detection (1998-05-05),
5. 5701524 - Focus detection device and focus detection method (1997-12-23),
6. 5672930 - Vibration motor (1997-09-30),
7. 5640619 - Multiple point focus detection camera (1997-06-17),
8. 5572281 - Photo-taking apparatus capable of making a photograph with flash by a (1996-11-05),
9. 5568223 - Multiple point focus detection camera (1996-10-22),
10. 5563676 - Camera having standard and panoramic focusing modes (1996-10-08),
11. 5512974 - Target follow-up device and camera comprising the same (1996-04-30),
12. 5450162 - Photo-taking apparatus capable of making a photograph with flash by a (1995-09-12),
13. 5305048 - A photo taking apparatus capable of making a photograph with flash by a (1994-04-19),
14. 4933700 - Automatic focusing apparatus of camera (1990-06-12),

Title: Innovations of Tsutomu Narisawa in Photography Technology

Introduction

Tsutomu Narisawa, based in Saitama-ken, Japan, is a notable inventor known for his contributions to photography technology. With a strong portfolio of 14 patents, his work has significantly influenced the way focus detection and brightness distribution are managed in camera systems.

Latest Patents

Narisawa's latest innovations include a focus detection device and method. This invention allows for the selection of a specific focus detection area from multiple options on a photography screen. By utilizing a pair of photoelectric converters, the system accumulates charge based on image signals from the chosen focus area. This enables the computation of focus adjustment conditions while maintaining the responsiveness of the system when switching focus areas. Additionally, he designed a camera capable of displaying brightness distribution. This camera is equipped with a photometric sensor featuring numerous photoelectric conversion sub-elements that conduct photometry across various subject regions, coupled with a display device that visually represents the brightness distribution detected by the sensor.

Career Highlights

Tsutomu Narisawa's career is marked by his ongoing association with Nikon Corporation, a leading company in the imaging industry. His innovative spirit and technical expertise have been paramount in developing cutting-edge photographic technology.

Collaborations

Throughout his career, Narisawa has collaborated with distinguished colleagues such as Shinichi Suzuki and Seiichi Yasukawa. Together, they have contributed to various advancements in camera technology, reinforcing the collaborative nature of innovation in this field.

Conclusion

Tsutomu Narisawa's work exemplifies the impact of innovative thinking in technology, particularly in photography. His patents not only enhance camera functionality but also showcase the importance of collaboration among inventors in pushing the boundaries of what is possible in photography technology.

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