Sei Matsui
10Patents
5h-index
—Co-inventors
53Inventor score
Filing activity: Mar 11, 1976 → Sep 30, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4338001A | Telephoto lens system | Physics | 121 | Expired |
| US5831775A | Long focal length microlens system | Physics | 18 | Expired |
| US5825546A | """Macro"" Photographic lens having long focal length and vibration compensation" | Physics | 7 | Expired |
| US4099850A | Wide angle photographic lens | Physics | 6 | Expired |
| US4139265A | Modified gauss type photographic lens | Physics | 5 | Expired |
| US5909319A | Long focal length macrolens system | Physics | 5 | Expired |
| US4118722A | Optical system for indication in the viewfinder of single-lens reflex camera | Physics | 2 | Expired |
| US4303314A | Compact telephoto lens | Physics | 2 | Expired |
| US4062630A | Telephoto lens system | Physics | 1 | Expired |
| US4162498A | Viewfinder for reflex camera | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.