Yoshitaka Hayashi
39Patents
14h-index
84Co-inventors
84Inventor score
Filing activity: Mar 10, 1982 → Nov 2, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6280684A | Sputtering target, method of producing the target, optical recording medium fabricated by using the sputtering target, and method of fabricating the optical recording medium | Emerging Cross-Sectional Technologies | 220 | Expired |
| US4795278A | Bearing assembly | Mechanical Engineering; Lighting; Heating | 66 | Expired |
| US5018384A | Rotational speed detector | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US7102314B2 | Brushless motor control apparatus having overheat protecting function | Electricity | 35 | Expired |
| US5785828A | Sputtering target for producing optical recording medium | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5885733A | Non-aqueous secondary lithium battery | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4783180A | Bearing assembly for vehicle | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US5900336A | Negative electrode for lithium secondary battery and lithium secondary battery using the negative electrode | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6101488A | Intelligent information program generation and retrieval system | Physics | 25 | Expired |
| US5135893A | Carbonaceous ceramic composite for use in contact with molten nonferrous metal | Chemistry; Metallurgy | 24 | Expired |
| US6127016A | Sputtering target, method of producing the target, optical recording medium fabricated by using the sputtering target, and method of fabricating the optical recording medium | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4545537A | Shredder with increased reversed unlocking torque | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6920668B2 | Hinge unit and electronic apparatus unit | Fixed Constructions | 14 | Expired |
| US5882493A | Heat treated and sintered sputtering target | Physics | 14 | Expired |
| US6503592B1 | Sputtering target, method of producing the target, optical recording medium fabricated by using the sputtering target, and method of fabricating the optical recording medium | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6933032B2 | Write-once-read-many optical recording media and process for recording and reproducing information on the media | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6152605A | Ball bearing | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6849024B2 | Starting clutch and method of controlling the same | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US7488526B2 | Sputtering target and manufacturing method therefor, and optical recording medium and manufacturing method therefor | Physics | 6 | Active |
| US4913276A | Clutch releasing apparatus | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US8124211B2 | Optical recording medium, sputtering target, and method for manufacturing the same | Emerging Cross-Sectional Technologies | 4 | Active |
| US6913252B2 | Damper device | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US7413788B2 | Write-once-read-many optical recording media and process for recording and reproducing information on the media | Emerging Cross-Sectional Technologies | 4 | Active |
| US9543880B2 | Rotary machine control apparatus | Electricity | 3 | Active |
| US8134326B2 | Motor drive apparatus and method for electric power steering system | Electricity | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.