Inventor
Seijiro Tokutomi
Inventor
Tokyo, JP
Overview
Patents· 18 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus65%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them35%
PatentTitleYear
4,600,830'Focus detecting device'19864,580,042'Focusing position detecting device using a sector shaped mirror'19864,408,853'Focus detecting device'19834,384,770'Focus detecting device'19834,313,657'Display device for focus detecting and indicating device for camera'19824,293,206'Electrically operated automatic focalizing camera'19814,293,205'Camera focus detecting device'19814,265,520'Focus detecting device in single lens reflex camera'19814,258,989'Focus detecting device'19814,253,751'Camera focus detecting device'19814,244,643'Manual setting device in digital type electrical control camera'19814,230,401'Camera focus detecting device'19804,192,589'Abnormal operation warning apparatus for a camera'19804,180,309'Focal point detecting device for SLR camera'19794,172,645'Dual purpose finder display for single lens reflex camera'19794,171,884'Electrically controlled camera device'19794,083,056'Focus detecting device for single-lens reflex cameras'19783,995,286'Electronic strobe with optionally-operable controls'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1986Patents assigned to ASAHI OPTICAL CO LTD (18)· patent assignee history
1976Based in Kawagoe, JP· patent location history
1978–1986Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ASAHI OPTICAL CO LTD | 18 | 1976–1986 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 17 | 1978–1986 |
| Kawagoe, JP | 1 | 1976 |