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For the Inventor, By the Inventor

Tokyo, Japan

Sadatoshi Takahashi

This inventor holds 25 USPTO granted patents, primarily in Zoom Lens Technology. Top assignee: Canon Kabushiki Kaisha. Active years: 1985-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Sadatoshi Takahashi. Retrieved from https://idiyas.com/inventor/sadatoshi-takahashi

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

USPTO Granted Patents = 25

% Patents Active = 100.0

Average Co-Inventor Count = 2.7

ph-index = 11

Forward Citations = 304(Granted Patents)


Company Filing History:

goldMedal25 out of 92,994 
 
Canon Kabushiki Kaisha
 patents

Years Active: 1985-1993

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Areas of Expertise:
Zoom Lens
Wide-Angle Lens
Telephoto Lens
High Magnification
Compact Lens
Aperture Ratio
Aberration Correction
Focal Length
Image Features
Optical Design
Scanning Lens
Lens System
25 patents (USPTO):Explore Patents
1. 5253005 - Small-sized camera (1993-10-12),
2. 5144488 - Zoom lens (1992-09-01),
3. 5000550 - Wide-angle type zoom lens having inner-focus lens (1991-03-19),
4. 4949107 - Camera having telescopic capability (1990-08-14),
5. 4896950 - Zoom lens of high power varying ratio (1990-01-30),
6. 4865434 - Zoom lens capable of selecting a focal length beyond a standard focal (1989-09-12),
7. 4852984 - Telephoto lens of large aperture ratio (1989-08-01),
8. 4830477 - Zoom lens capable of obtaining focal lengths beyond a variable focal (1989-05-16),
9. 4810072 - Zoom lens (1989-03-07),
10. 4781446 - Zoom lens having a capability of introducing special features into image (1988-11-01),
11. 4749266 - Compact zoom lens having a large aperture and good aberation correction (1988-06-07),
12. 4720180 - High magnification range zoom lens (1988-01-19),
13. 4717245 - High relative aperture Gauss type lens (1988-01-05),
14. 4711534 - Zoom lens able to obtain focal lengths beyond the zooming range (1987-12-08),
15. 4696553 - Zoom lens having a large zoom ratio (1987-09-29),

Title: **Sadatoshi Takahashi: Innovator in Camera Technology**

Introduction

Sadatoshi Takahashi, based in Tokyo, Japan, is a distinguished inventor known for his significant contributions to camera technology. With a remarkable portfolio of 25 patents, Takahashi has been instrumental in enhancing photographic systems and lens design.

Latest Patents

Among his latest innovations is a **small-sized camera** that features a unique system wherein light from a photographic lens, aligned parallel to a photosensitive plane, is directed using first and second mirrors. This innovative design allows for light conduction to an eyepiece lens, thus forming an effective finder system. Additionally, he has developed a structure that efficiently removes stray light, enhancing the overall functionality of the camera.

Another notable invention is a **zoom lens** that consists of multiple lens groups: a first lens group of positive power, a second lens group of negative power, a third group of positive power, and a fourth group. This innovative lens design allows for at least two groups to be moved for zooming, while the second group is adjusted for focusing. This configuration meets specific criteria that contribute to improved photographic outcomes.

Career Highlights

Sadatoshi Takahashi currently works at Canon Kabushiki Kaisha, a leading company in imaging and optical products. Throughout his career, he has focused on the advancement of camera technologies and lens systems, which have been pivotal in both commercial and consumer photography.

Collaborations

Takahashi collaborates with esteemed colleagues such as Nozomu Kitagishi and Tsunefumi Tanaka. Their collective expertise and innovative spirit contribute to the development of cutting-edge photographic technologies and enhance the research culture within their laboratory.

Conclusion

Sadatoshi Takahashi continues to inspire the field of photography with his groundbreaking inventions. His commitment to innovation at Canon Kabushiki Kaisha and the successful collaboration with his peers solidify his position as a leading figure in the development of advanced camera technologies. As he pushes the boundaries of what is possible, Takahashi remains a prominent inventor whose work will leave a lasting impact on the industry.

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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