Akira Tsutsumi
23Patents
11h-index
44Co-inventors
75Inventor score
Filing activity: Sep 1, 1981 → Oct 23, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7647897B2 | Heating apparatus | Emerging Cross-Sectional Technologies | 49 | Expired |
| US4677252A | Circuit board | Electricity | 24 | Expired |
| USD570974S1 | Gas water heater | General | 18 | Expired |
| USD570976S1 | Gas water heater | General | 18 | Expired |
| US7458340B2 | Water heater | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4417125A | Laser processing machine | Performing Operations; Transporting | 14 | Expired |
| US4406940A | Laser processing machine | Performing Operations; Transporting | 14 | Expired |
| US4434349A | Laser beam cutting machines and the like | Performing Operations; Transporting | 12 | Expired |
| US6294316A | Processes for manufacturing flexible printed wiring boards | Electricity | 11 | Expired |
| US6420659B1 | Flexible wiring board pieces and wiring sheets | Electricity | 11 | Expired |
| US6323434A | Circuit board and production method thereof | Electricity | 11 | Expired |
| USD570973S1 | Gas water heater | General | 9 | Expired |
| US4472055A | Method and apparatus for detecting the focusing position in a laser machining apparatus | Physics | 9 | Expired |
| US6930390B2 | Flexible printed wiring boards | Electricity | 8 | Expired |
| US4520261A | Detector for the deviation of the optical axis in laser processing apparatus | Performing Operations; Transporting | 7 | Expired |
| US6362433B1 | Flexible printed circuit board | Electricity | 7 | Expired |
| US6233821A | Processes for manufacturing flexible printed wiring boards | Emerging Cross-Sectional Technologies | 6 | Expired |
| USD570975S1 | Gas water heater | General | 5 | Expired |
| US4503313A | Relatively adjustable laser and optic system for laser processing | Performing Operations; Transporting | 5 | Expired |
| US6344308B1 | Method of manufacturing a flexible circuit board | Electricity | 4 | Expired |
| US6061020A | Method and apparatus for transmitting radio wave by rotating plane of polarization | Electricity | 2 | Expired |
| US6638689B1 | Photoresist compositions and flexible printed wiring boards with protective layer | Emerging Cross-Sectional Technologies | 1 | Expired |
| US11740773B2 | Information processing device and method | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.