Kazumasa Umeya
5Patents
4h-index
11Co-inventors
50Inventor score
Filing activity: Nov 17, 1975 → Apr 22, 1992
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4096098A | Semiconductor ceramic composition | Electricity | 15 | Expired |
| US4245146A | Heating element made of PTC ceramic material | Electricity | 12 | Expired |
| US4654510A | PTC heating apparatus | Electricity | 5 | Expired |
| US5296424A | System of dielectric ceramic compositions suitable for microwave applications | Electricity | 4 | Expired |
| US5030386A | BaTiO.sub.3 ceramic temperature sensor with improved positive temperature coefficient of resistance | Chemistry; Metallurgy | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.