Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5594358 | Radio frequency probe and probe card including a signal needle and grounding needle coupled to a microstrip transmission line | Osamu Ishikawa | 1997-01-14 |
| 5592122 | Radio-frequency power amplifier with input impedance matching circuit based on harmonic wave | Maeda Masahiro, Osamu Ishikawa | 1997-01-07 |