Minoru Sawada
30Patents
10h-index
36Co-inventors
75Inventor score
Filing activity: Dec 12, 1990 → Sep 1, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5518437A | Toy top and drive unit for spinning the top | Human Necessities | 49 | Expired |
| US5689578A | Polarized wave holding optical fiber, production method therefor, connection method therefor, optical amplifier, laser oscillator and polarized wave holding optical fiber coupler | Physics | 33 | Expired |
| US5593338A | Spinner and adapter for toy tops and combination of spinner and toy top | Human Necessities | 32 | Expired |
| USD356347S | Top | General | 22 | Expired |
| USD353632S | Top | General | 18 | Expired |
| US5404032A | Field-effect semiconductor device | Electricity | 16 | Expired |
| US5650642A | Field effect semiconductor device | Electricity | 12 | Expired |
| USD353633S | Top spinner | General | 11 | Expired |
| US5258632A | Velocity modulation transistor | Electricity | 10 | Expired |
| US5724459A | Optical modulation device and fiber optic communication system | Physics | 10 | Expired |
| US6212150A | Optical pickup apparatus and optical recording medium drive employing the same including a first photo receiving element for detecting the state of light beam and a second photo receiving element for reproducing information | Physics | 7 | Expired |
| US6023448A | Optical pickup device and optical recording medium driving apparatus comprising the same | Physics | 7 | Expired |
| US7724393B2 | Judging whether trapping process is required or not | Electricity | 6 | Active |
| US5751027A | Field effect semiconductor device with a low-noise drift layer and a high-power drift layer | Electricity | 6 | Expired |
| US6144623A | Optical pickup apparatus and optical recording medium drive employing the same | Physics | 5 | Expired |
| US6909687B2 | Optical pickup with a diffraction element consist of six regions providing spatial variation corresponding to a focas state | Physics | 5 | Expired |
| USD353848S | Top spinner | General | 4 | Expired |
| US6181667A | Optical pickup apparatus capable of suppressing offset of a tracking error signal | Physics | 3 | Expired |
| US5751029A | Field-effect semiconductor device having heterojunction | Electricity | 3 | Expired |
| US6917454B2 | Holographic optical element, position shift detecting apparatus, optical pickup apparatus, optical recording medium drive and method of fabricating holographic optical element | Physics | 2 | Expired |
| US6339563B2 | Optical pickup apparatus capable of suppressing offset of a tracking error signal | Physics | 2 | Expired |
| USD378769S | Top spinner | General | 1 | Expired |
| US7616344B2 | Image processing apparatus and method for printing and plate making, and recording medium having image processing program recorded therein for printing and plate making | Physics | 1 | Active |
| US5225895A | Velocity-modulation transistor with quantum well wire layer | Electricity | 1 | Expired |
| US6501715B2 | Optical pickup apparatus employing an adjusting circuit | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.