Yo Tajima
11Patents
6h-index
13Co-inventors
59Inventor score
Filing activity: Nov 12, 1987 → Jul 28, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4829374A | Surface inspection apparatus | Physics | 14 | Expired |
| US5406371A | Apparatus for measuring birefringence and retardation | Physics | 12 | Expired |
| US4897537A | Automatic focus adjusting system of microscope employed in surface inspection apparatus | Physics | 12 | Expired |
| US5326733A | Silicon nitride sintered product excellent in wear resistance | Chemistry; Metallurgy | 9 | Expired |
| US5114888A | Silicon nitride sintered body and method for producing same | Chemistry; Metallurgy | 8 | Expired |
| US5049531A | Silicon nitride sintered body | Chemistry; Metallurgy | 7 | Expired |
| US5286684A | Aluminum oxide-based sintered object and process for producing the same | Chemistry; Metallurgy | 6 | Expired |
| US5032554A | Sintered silicon nitride products | Chemistry; Metallurgy | 5 | Expired |
| US4880756A | Silicon nitride sintered product | Chemistry; Metallurgy | 2 | Expired |
| US5858899A | Aluminum oxide based sintered body | Chemistry; Metallurgy | 1 | Expired |
| US5527746A | Method for manufacturing an aluminum oxide sintered body | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.