Inventor
Kouji Oizumi
Inventor
Kanagawa, JP
Overview
Patents· 19 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus74%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them17%
G01CMeasuring distances, levels or bearings4%
G01SRadio direction-finding4%
PatentTitleYear
5,305,148'Compact varifocal lens'19945,270,857'Optical system for stabilizing an image'19935,270,866'Compact zoom lens'19935,253,005'Small-sized camera'19935,125,735'Automatic multi-point distance measuring device'19925,055,868'Variable magnification finder of real image type'19914,957,356'Finder device'19904,949,107'Camera having telescopic capability'19904,871,238'Photographic optical device with variable magnification'19894,842,395'Finder of variable magnification'19894,830,474'Variable magnification optical system'19894,770,508'Conversion lens releasably attached behind master lens'19884,757,336'View finder of variable magnification'19884,751,539'Variable power finder'19884,726,668'Zoom lens of short total length'19884,702,581'Flash device for camera'19874,697,882'Beam splitter for changing optical paths small tilt'19874,652,091'Compact zoom lens with short back focal distance'19874,643,536'Rear conversion lens'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–1994Patents assigned to CANON KK (19)· patent assignee history
1987–1994Based in Kanagawa, JP· patent location history
1989Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CANON KK | 19 | 1987–1994 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kanagawa, JP | 18 | 1987–1994 |
| Tokyo, JP | 1 | 1989 |