Hiroshi Obara
24Patents
12h-index
38Co-inventors
81Inventor score
Filing activity: Aug 8, 1974 → Oct 18, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3935485A | Piezoelectric key board switch | Emerging Cross-Sectional Technologies | 89 | Expired |
| US6057936A | Image forming apparatus having internal space for sheet ejection and retention | Electricity | 37 | Expired |
| USD478618S1 | Printer for a computer | General | 33 | Expired |
| USD447766S | Portable printer | General | 30 | Expired |
| US3969927A | Vibration measuring and the apparatus therefor | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4406967A | Ultrasonic probe | Emerging Cross-Sectional Technologies | 20 | Expired |
| US7552998B2 | Method and apparatus for image forming capable of increasing maintenance efficiency | Performing Operations; Transporting | 19 | Active |
| US4258259A | Infrared detector | Physics | 16 | Expired |
| US5216566A | Floppy disk unit with liner of fibers containing inorganic oxide powder | Physics | 15 | Expired |
| US5756130A | Stamper for producing recording medium | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4258260A | Pyroelectric infrared detector | Electricity | 13 | Expired |
| US4071785A | Laminated piezoelectric matrix switch | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4543293A | Polarized, shaped material of copolymer of vinylidene fluoride | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6276366A | Rod-shaped test-piece testing apparatus | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4412147A | Ultrasonic holography imaging device having a macromolecular piezoelectric element transducer | Emerging Cross-Sectional Technologies | 7 | Expired |
| USD313809S | Camera | General | 7 | Expired |
| USD510090S1 | Bar code reader | General | 7 | Expired |
| USD323521S | Camera | General | 5 | Expired |
| US5873982A | Method and apparatus of discriminating coal species | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4467202A | Photoelectric detector | Physics | 4 | Expired |
| US5091623A | Welding gun provided with a backup cylinder | Performing Operations; Transporting | 4 | Expired |
| US4577090A | Primary cable apparatus for robot welding gun | Performing Operations; Transporting | 3 | Expired |
| US3984903A | Method of spanning across a frame a high-molecular-weight piezoelectric element | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4673793A | Connecting metal fittings for resistance welder | Electricity | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.