Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4893635 | Apparatus for performing a biopsy | William J. de Groot, Theodore J. de Groot | 1990-01-16 |
| 4766907 | Apparatus and method for performing a biopsy and a device for manipulating same | William J. de Groot, Theodore J. de Groot | 1988-08-30 |