Tetsuo Sekiya
19Patents
11h-index
32Co-inventors
72Inventor score
Filing activity: Dec 10, 1974 → Nov 26, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4167692A | Brush-less DC motor | Electricity | 51 | Expired |
| US4729048A | Magnetic transducer combination with formatting, data, and servo heads | Physics | 40 | Expired |
| US5822159A | Thin-film magnetic head, magnetoresistance effect magnetic head and composite magnetic head | Physics | 29 | Expired |
| US4701815A | Tracking servo system for disc memory | Physics | 23 | Expired |
| US5065390A | Optical playback head | Physics | 21 | Expired |
| US5313342A | Analog/digital compatible reproducing system | Physics | 20 | Expired |
| US5260836A | Apparatus for reproducing digital and analog audio signals | Physics | 15 | Expired |
| US4757410A | Magnetoresistance effect for short and long wavelength recordings | Physics | 14 | Expired |
| US5872691A | Thin film magnetic head, magnetoresistance effect magnetic head and composite magnetic head | Physics | 14 | Expired |
| US4713710A | Compact multiple magnetic head apparatus | Physics | 13 | Expired |
| US4673998A | Magnetic transducer head having series connected magnetroresistance effect sensing element with head output connected between the sensing elements | Physics | 12 | Expired |
| US4516179A | Magnetic transducer head utilizing magnetoresistance effect | Physics | 8 | Expired |
| US5424890A | Magnetoresistance effect type thin film head | Physics | 7 | Expired |
| US5436772A | Magnetic recording and reproducing apparatus having magneto-resistance effect element | Physics | 5 | Expired |
| US4077373A | Ignition timing control device for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5145259A | Bearing system | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US4524401A | Magnetic transducer head utilizing magneto resistance effect with a bias field and partial saturation | Physics | 3 | Expired |
| US5197806A | Bearing system | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US8575878B2 | Energy converter | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.