Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7521998 | Operational amplifier and scanning electron microscope using the same | — | 2009-04-21 |
| 5869921 | Spark plug for internal combustion engine having platinum and iridium alloyed emissive tips | Wataru Matsutani | 1999-02-09 |
| 5440198 | Spark plug having a noble metal firing tip bonded to a front end of a center electrode | Takafumi Oshima | 1995-08-08 |
| 5347193 | Spark plug having an erosion resistant tip | Takafumi Oshima, Kazuya Iwata | 1994-09-13 |
| 5320569 | Method of making a spark plug | Takafumi Oshima, Mamoru Musasa, Kazuya Iwata | 1994-06-14 |
| 5273474 | Method of manufacturing a center electrode for a spark plug | Takafumi Oshima | 1993-12-28 |
| 5224026 | Alternatable constant current circuit | — | 1993-06-29 |
| 4570498 | Differential pressure measuring transducer assembly | — | 1986-02-18 |
| 4507600 | Two-terminal current regulator | — | 1985-03-26 |
| 4362060 | Displacement transducer | Takashi Kugaya | 1982-12-07 |
| 4264889 | Pressure transducer | Yoshimi Yamamoto, Mitsuo Ai, Yoshitaka Matsuoka, Takeo Nagata, Akira Ikegami | 1981-04-28 |