Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884001 | Monolithic electro-acoustic device having an acoustic charge transport device integrated with a transistor | Robert N. Sacks | 1989-11-28 |
| 4863157 | Method and apparatus for exercising a paralyzed limb | Frank Mendel, Dale R. Fish, Robert E. Kell | 1989-09-05 |