Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5272597 | Attachment for surface-mounting a resonator crystal on a circuit board | Gerald E. Roberts | 1993-12-21 |
| 4484158 | Monolithic crystal filter and method of manufacturing same | Gerald E. Roberts | 1984-11-20 |
| 4433316 | Crystal filter and method for fabrication | Gerald E. Roberts | 1984-02-21 |