Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11896959 | Hydrotreating catalyst for hydrocarbon oil, method for producing the same, and method for hydrotreating hydrocarbon oil | Yusuke Matsumoto, Midori Kobayashi | 2024-02-13 |
| 7346123 | Quadrature modulator | — | 2008-03-18 |
| 6636085 | Phase shifter with an RC polyphase filter | Yukio Okazaki | 2003-10-21 |
| 6531920 | Differential amplifier circuit | — | 2003-03-11 |
| 6177839 | Variable gain amplifier circuit | — | 2001-01-23 |
| 6054883 | High accuracy 90.degree. phase shift circuit error detection | — | 2000-04-25 |