Iwao Sagara
8Patents
6h-index
11Co-inventors
60Inventor score
Filing activity: May 22, 1974 → Oct 17, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4614144A | Music card system | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4518827A | Telephone answering and message recording system | Electricity | 40 | Expired |
| US4482787A | Telephone-call prohibit circuit | Electricity | 18 | Expired |
| US3956758A | Warning device for photographic cameras | Physics | 16 | Expired |
| US3955892A | Device for indicating exposure information in the viewfinder of a camera | Physics | 15 | Expired |
| US8324816B2 | LED driving circuit | Electricity | 8 | Active |
| US3932865A | Analog-to-digital converter | Electricity | 4 | Expired |
| US7511389B2 | Emergency electric power supply unit | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.