Company Filing History:

17 out of 90,809

Canon Kabushiki Kaisha

where one patent can have more than one assignee

Years Active: 2003-2010

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17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7808547 - Lens apparatus and image-taking apparatus including drive range limiting function having valid and invalid states (2010-10-05),

2. 7755695 - Camera system and lens apparatus (2010-07-13),

3. 7460166 - Switchover image taking apparatus (2008-12-02),

4. 7456895 - Relay unit (2008-11-25),

5. 7388615 - Lens apparatus allowing changing user settings to standard settings (2008-06-17),

6. 7280148 - Optical control system (2007-10-09),

7. 7265788 - Lens apparatus with changeable image-capturing function setting (2007-09-04),

8. 7158179 - Optical device, optical device driving unit, and camera system (2007-01-02),

9. 7095566 - Drive controller for lens apparatus (2006-08-22),

10. 7079182 - Optical apparatus, optical apparatus driving unit and camera system (2006-07-18),

11. 6717618 - Adapter device for connecting a photographic optical system to a camera (2004-04-06),

12. 6704503 - Optical device, optical device driving unit, information write device, preset information setting system, and camera system (2004-03-09),

13. 6701073 - Optical driving unit, optical apparatus and camera system (2004-03-02),

14. 6633729 - Optical apparatus, optical apparatus driving unit and camera system (2003-10-14),

15. 6605916 - Rotation position control apparatus of rotary element of filter (2003-08-12),

Title: Kazumasa Yoshikawa: Innovator in Lens Technology

Introduction

Kazumasa Yoshikawa is a prominent inventor based in Utsunomiya, Japan. He has made significant contributions to the field of lens technology, holding a total of 17 patents. His work has been instrumental in advancing camera systems and lens apparatuses.

Latest Patents

Yoshikawa's latest patents include a lens apparatus and an image-taking apparatus featuring a drive range limiting function. This innovative drive control apparatus allows for precise movement of a zoom lens between telephoto and wide-angle ends. The system includes a selecting member that determines the zoom position and a controller that manages the drive range limiting function. Another notable patent is for a camera system that enables various types of lens apparatuses to be used with a single image-taking apparatus without the need for adjustments to focus control signals. This system enhances compatibility and usability across different lens types.

Career Highlights

Throughout his career, Kazumasa Yoshikawa has worked with leading companies in the technology sector, including Canon and Sony. His experience in these organizations has allowed him to develop cutting-edge technologies that have shaped the industry.

Collaborations

Yoshikawa has collaborated with notable colleagues such as Satoshi Natsume and Isao Tanaka. Their combined expertise has contributed to the successful development of innovative lens technologies.

Conclusion

Kazumasa Yoshikawa's contributions to lens technology and camera systems have made a lasting impact on the industry. His innovative patents and collaborations with leading companies and talented individuals highlight his role as a key figure in the field.

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