Masao Yamada
47Patents
12h-index
65Co-inventors
84Inventor score
Filing activity: Nov 19, 1973 → Jun 11, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5594415A | Display device for a vehicle | Performing Operations; Transporting | 89 | Expired |
| US5143442A | Portable projection device | Emerging Cross-Sectional Technologies | 51 | Expired |
| US6491133B2 | Soundproof type engine driven work machine | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| USD575733S1 | Engine generator | General | 34 | Expired |
| US5779371A | Thermal printing apparatus | Performing Operations; Transporting | 30 | Expired |
| US5811948A | Control apparatus for electric motor | Electricity | 27 | Expired |
| US5331180A | Porous semiconductor light emitting device | Emerging Cross-Sectional Technologies | 26 | Expired |
| USD480359S1 | Engine generator | General | 25 | Expired |
| US5463370A | Display device for a vehicle | Performing Operations; Transporting | 21 | Expired |
| US5427977A | Method for manufacturing porous semiconductor light emitting device | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6337796B2 | Semiconductor device mount structure having heat dissipating member for dissipating heat generated from semiconductor device | Electricity | 14 | Expired |
| US5082695A | Method of fabricating an X-ray exposure mask | Physics | 13 | Expired |
| US5178977A | Manufacturing method of an X-ray exposure mask | Physics | 12 | Expired |
| US5156854A | Press forming apparatus for sintered parts | Performing Operations; Transporting | 12 | Expired |
| US5318393A | Tap | Emerging Cross-Sectional Technologies | 11 | Expired |
| USD571292S1 | Engine generator | General | 9 | Expired |
| US5848940A | Playground | Human Necessities | 8 | Expired |
| US4571851A | Slippers | Human Necessities | 8 | Expired |
| US6630748B2 | Load control apparatus and method having single temperature detector | Electricity | 7 | Expired |
| US3961354A | Mesa type thyristor and its making method | Electricity | 7 | Expired |
| US5197687A | Automatic roll-in take-up reel and multi-color image recording apparatus using the same | Performing Operations; Transporting | 6 | Expired |
| US5017333A | Multi-region reactor core pebble bed high temperature gas reactor | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5397942A | Driver circuit for a plurality of outputs | Physics | 5 | Expired |
| US5225153A | Pebble-type high temperature gas reactor | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6844614B2 | Semiconductor integrated circuit | Electricity | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.