Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6726711 | Artificial blood vessel with transcutaneous access ports | John Gregory Robinson | 2004-04-27 |
| 4844521 | Security door lock | John F. Lagenbach | 1989-07-04 |
| 4679353 | Security door | John F. Langenbach | 1987-07-14 |
| 4678373 | Apparatus for and method of shoring a structure | — | 1987-07-07 |
| 4593694 | Tweezers | — | 1986-06-10 |
| 4563110 | Shoring apparatus and method | John F. Langenbach | 1986-01-07 |