Hitoshi Sakamoto
101Patents
15h-index
96Co-inventors
89Inventor score
Filing activity: Jun 28, 1977 → Apr 28, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6958175B2 | Film forming method and film forming device | Electricity | 234 | Expired |
| US6656540B2 | Method for forming metallic film and apparatus for forming the same | Electricity | 66 | Expired |
| US4237399A | Driving circuit for piezo-electric multimorph transducer | Electricity | 58 | Expired |
| US7048973B2 | Metal film vapor phase deposition method and vapor phase deposition apparatus | Chemistry; Metallurgy | 58 | Expired |
| US4172265A | Automatic head tracking system | Physics | 37 | Expired |
| US4161001A | Video signal reproducing apparatus with a manually controlled track searching arrangement | Physics | 35 | Expired |
| US7977243B2 | Barrier metal film production apparatus, barrier metal film production method, metal film production method, and metal film production apparatus | Electricity | 32 | Active |
| US4404605A | Head tracking control system | Physics | 31 | Expired |
| US4420778A | Head tracking control system for a helical scan VTR | Physics | 27 | Expired |
| US4486796A | Apparatus and method for controlling the position of a rotary head | Physics | 22 | Expired |
| US4163994A | Automatic head tracking system utilizing transducer deflecting means and synchronous demodulation of the envelope signal | Physics | 21 | Expired |
| US4390909A | Video signal reproducing apparatus with tape tension control arrangement | Physics | 20 | Expired |
| US5218490A | Tape tension servo-system for video tape recording and/or reproducing apparatus | Physics | 19 | Expired |
| US4160195A | Tape control apparatus | Physics | 17 | Expired |
| US4210939A | Method and system for synchronizing the movement of plural recording media | Physics | 16 | Expired |
| US7012964B1 | Method and device for data transmission | Electricity | 15 | Expired |
| US4443823A | Controlling the trace of a rotary head | Physics | 15 | Expired |
| US4287538A | Magnetic head tracking control system | Physics | 14 | Expired |
| US4229773A | Video signal recording system with automatic head positioning | Physics | 13 | Expired |
| US4361857A | Automatic head tracking system | Physics | 13 | Expired |
| US4254367A | Digital servo circuit | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4296443A | Magnetic head tracking control system | Physics | 13 | Expired |
| US5951915A | Phosphorescent phosphor | Chemistry; Metallurgy | 13 | Expired |
| US4717824A | Photoelectric displacement detecting apparatus | Electricity | 12 | Expired |
| US4206485A | Digital phase servo system | Emerging Cross-Sectional Technologies | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.