Hiroyuki Yokoyama
56Patents
9h-index
44Co-inventors
78Inventor score
Filing activity: Feb 3, 1981 → Nov 28, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5336058A | Scroll-type compressor with variable displacement mechanism | Mechanical Engineering; Lighting; Heating | 95 | Expired |
| US5586138A | Multiple-cavity semiconductor laser capable of generating ultrashort light pulse train with ultrahigh repetition rate | Electricity | 86 | Expired |
| US6031851A | Mode-locked semiconductor laser and method of driving the same | Electricity | 36 | Expired |
| US6324166A | Call setup control apparatus in ATM switch | Electricity | 25 | Expired |
| US4976930A | Method and apparatus for inducing photochemical reaction | Physics | 21 | Expired |
| US6124966A | Optical functional amplifying method and optical functional amplifying device | Electricity | 17 | Expired |
| US7598980B2 | Image pickup device for judging and displaying hand-waggling level and cellular phone using the same | Electricity | 15 | Active |
| US6247910A | Scroll type compressor which requires no flange portions or holes for solely positioning purposes | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4502790A | Electronic timepiece | Physics | 10 | Expired |
| US7538936B2 | Pulse laser beam generating device | Electricity | 7 | Expired |
| US9676251B2 | Heating device and method for manufacturing heating device | Emerging Cross-Sectional Technologies | 5 | Active |
| US6698941B2 | Mode locking semiconductor laser system including external cavity | Electricity | 4 | Expired |
| US8982920B2 | Submount, submount assembly, and submount assembling method | Electricity | 4 | Active |
| US6795479B2 | Generation of optical pulse train having high repetition rate using mode-locked laser | Electricity | 4 | Expired |
| US6650845B1 | Optical repeater using two mode-locked laser diodes for regenerating output pulses of same wavelength as incident optical pulses | Electricity | 4 | Expired |
| US7522826B2 | Imaging apparatus and portable device and portable telephone using same | Electricity | 4 | Active |
| US9664412B2 | Heating device | Electricity | 4 | Active |
| US8786941B2 | Semiconductor optical amplifier | Electricity | 3 | Active |
| US6973270B2 | Reflection routing method in optical packet switching network and optical packet switch for reflection routing | Electricity | 3 | Expired |
| US10415115B2 | Continuous annealing system and continuous annealing method | Chemistry; Metallurgy | 3 | Active |
| US7731486B2 | Compressor with dual pathways for returning lubricating oil | Emerging Cross-Sectional Technologies | 2 | Active |
| US7255543B2 | Scroll compressor and air-conditioning system for vehicle using the scroll compressor | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US8081669B2 | Method of driving laser diode device and laser diode equipment | Electricity | 2 | Active |
| US8615027B2 | Laser diode, optical disk device and optical pickup | Electricity | 2 | Active |
| US8831055B2 | Self-oscillating semiconductor laser device and driving method thereof | Electricity | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.