Isao Shimizu
38Patents
16h-index
67Co-inventors
84Inventor score
Filing activity: Aug 5, 1981 → Apr 21, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4618397A | Method of manufacturing semiconductor device having a pressure sensor | Emerging Cross-Sectional Technologies | 111 | Expired |
| US5351071A | Thermal printer | Performing Operations; Transporting | 94 | Expired |
| US6400173B1 | Test system and manufacturing of semiconductor device | Electricity | 72 | Expired |
| US4969207A | Radio receiver with reception deterioration compensation | Electricity | 41 | Expired |
| US6727723B2 | Test system and manufacturing of semiconductor device | Electricity | 40 | Expired |
| US6233182A | Semiconductor integrated circuit and method for testing memory | Physics | 40 | Expired |
| US6467056B1 | Semiconductor integrated circuit and method of checking memory | Physics | 34 | Expired |
| US5765372A | Lean burn engine for automobile | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5273014A | Intake system for engine | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4817197A | Mobile communication apparatus | Electricity | 26 | Expired |
| US5210547A | Image printing method and system | Electricity | 25 | Expired |
| US5046820A | Objective lens driving apparatus | Physics | 24 | Expired |
| US4672411A | Pressure sensor | Physics | 23 | Expired |
| US5260675A | Ladder-type electric filter device | Electricity | 22 | Expired |
| US5291012A | High resolution optical microscope and irradiation spot beam-forming mask | Physics | 21 | Expired |
| US5001498A | Thermal transfer printer | Performing Operations; Transporting | 21 | Expired |
| US6052255A | Magnetic disk unit having anti-impact arrangement | Physics | 15 | Expired |
| US6816868B1 | Database system | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4588472A | Method of fabricating a semiconductor device | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4885628A | Semiconductor integrated circuit device | Electricity | 11 | Expired |
| US4639757A | Power transistor structure having an emitter ballast resistance | Electricity | 9 | Expired |
| US4591780A | Constant current source device having a ratio metricity between supply voltage and output current | Physics | 9 | Expired |
| US5542114A | Radio receiver for suppressing frequency drift in an intermediate frequency stage | Electricity | 8 | Expired |
| US4407462A | Web drive apparatus | Physics | 8 | Expired |
| US4500900A | Emitter ballast resistor configuration | Electricity | 8 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.