Junji Umetsu
10Patents
6h-index
6Co-inventors
55Inventor score
Filing activity: Jun 11, 1976 → Nov 26, 1991
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4244591A | Device for protecting the operating section of a camera from water drops and dust | Physics | 16 | Expired |
| US4209247A | Environmentally protected camera with an interchangeable drawing type finder | Physics | 12 | Expired |
| US5253004A | Control device for camera | Physics | 9 | Expired |
| US4208118A | Moisture and dust proof sealing arrangement for camera body rear cover | Physics | 7 | Expired |
| US4132472A | Replaceable finder system for single-lens reflex camera | Physics | 6 | Expired |
| US4440403A | Drop-proof and dust-proof device in rotary operation section of camera | Physics | 6 | Expired |
| US4212525A | Release device in a camera having a motor drive unit | Physics | 5 | Expired |
| US4067033A | Correcting device for cameras with automatic exposure control | Physics | 5 | Expired |
| US4455723A | Removable coupling device between a photographic camera and an accessory | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4202617A | Shutter release security device in motor drive camera | Physics | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.