This inventor holds 8 USPTO granted patents. Top assignee: Canon Kabushiki Kaisha. Active years: 1976-1979.
Location History:
- Yokohama, J (1976)
- Yokohama, JA (1976 - 1978)
- Yokohama, JP (1978 - 1979)
Company Filing History:
Years Active: 1976-1979
Title: Keiichi Sakaguchi: Innovator in Optical Systems and Motion Picture Technology
Introduction
Keiichi Sakaguchi is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the fields of optical systems and motion picture technology. With a total of 8 patents to his name, Sakaguchi's work has had a lasting impact on the industry.
Latest Patents
One of his latest innovations is a zoom optical system. This system is composed of a positive focusing lens group, a negative variating lens group, a negative compensating lens group, and a positive rear fixed lens group. A rotating grooved cam moves the variating lens group and the compensating lens group in a given relation to each other along the optical axis in the normal focusing range. The focusing lens group is moved along the optical axis normal range for focusing. The variating lens group is kept stationary on the optical axis while the compensating lens group is moved along the optical axis during close-range focusing.
Another notable patent is a motion picture camera designed for use with a cartridge for film having a sound track. This camera includes sound recording means and a mechanism that actuates and releases the sound recording means to an operative state and to an inoperative state, respectively, in response to the actuation and release of a shutter release member. All necessary parts to engage a film are arranged in a cartridge chamber defined in the camera housing, allowing the operator to readily insert a cartridge into the chamber as long as the sound recording means are set to their inoperative position.
Career Highlights
Sakaguchi has been associated with Canon Kabushiki Kaisha, a leading company in imaging and optical products. His work has contributed to the advancement of camera technology and optical systems, making him a key figure in the industry.
Collaborations
Throughout his career, Sakaguchi has collaborated with notable coworkers such as Noritsugu Hirata and Toshikazu Ichiyanagi. These collaborations have further enriched his contributions to the field.
Conclusion
Keiichi Sakaguchi's innovative spirit and dedication to advancing optical systems and motion picture technology have established him as a significant inventor in his field. His patents continue to influence the industry and inspire future innovations.