Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5609154 | Duplexer including a variable capacitance diode for an ultrasound imaging system | Ralph Oppelt | 1997-03-11 |
| 5603324 | Duplexer including a field-effect transistor for use in an ultrasound imaging system | Ralph Oppelt | 1997-02-18 |