Hirofumi Okada
17Patents
10h-index
35Co-inventors
72Inventor score
Filing activity: Jul 19, 1989 → May 1, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6958675B2 | Vehicle remote controller | Physics | 161 | Expired |
| US6072403A | Door unlocking device for vehicle | Physics | 53 | Expired |
| US8188826B2 | Coil unit and electronic apparatus using the same | Electricity | 40 | Active |
| US4933768A | Sound reproducer | Electricity | 34 | Expired |
| US8541977B2 | Coil unit and electronic instrument | Electricity | 28 | Active |
| US7098791B2 | Security system and portable device usable therein | Emerging Cross-Sectional Technologies | 22 | Expired |
| US7267858B2 | Packaging material for and packaged product of medical supplies and the like | Emerging Cross-Sectional Technologies | 17 | Expired |
| US8269595B2 | Coil unit and electronic instrument | Electricity | 14 | Active |
| US6964520B1 | Packaging bag | Performing Operations; Transporting | 11 | Expired |
| US7068223B2 | Multiaxial antenna chip | Fixed Constructions | 10 | Expired |
| US8084991B2 | Power reception device, electronic apparatus, and non-contact power transmission system | Emerging Cross-Sectional Technologies | 8 | Active |
| US5594647A | Apparatus for determining emergency conditions of a vehicle | Performing Operations; Transporting | 7 | Expired |
| US6333765A | Television receiver having an AGC circuit to control the gain on a tuner | Electricity | 6 | Expired |
| US5364449A | Process for refining crude material for copper or copper alloy | Chemistry; Metallurgy | 5 | Expired |
| US8378774B2 | Coil unit and electronic apparatus using the same | Electricity | 2 | Active |
| US8248540B2 | Broadcast signal receiving apparatus | Electricity | 1 | Active |
| US8022801B2 | Coil unit and electronic instrument | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.