Hirofumi Ohta
11Patents
3h-index
19Co-inventors
57Inventor score
Filing activity: Feb 3, 1976 → Mar 26, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4860183A | Planar linear pulse motor | Electricity | 21 | Expired |
| US7653480B2 | Traffic information providing system | Physics | 12 | Expired |
| US4311364A | Camera filters and a method of making the same | Physics | 6 | Expired |
| US4334290A | Magnetic bubble memory element with heat sink | Physics | 1 | Expired |
| US4151608A | Circuit arrangement for suppressing magnetic induction noise due to an alternating magnetic field | Physics | 1 | Expired |
| US7753544B2 | Light control plate, surface light source device and transmissive image display device | Physics | 1 | Active |
| US4175288A | Magnetic bubble memory devices | Physics | 0 | Expired |
| US4293929A | Magnetic bubble memory devices | Physics | 0 | Expired |
| US11664198B2 | Plasma processing apparatus | Electricity | 0 | Active |
| US9701311B2 | Controller for vehicle | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US4322818A | Magnetic bubble memory device | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.