Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5260112 | Compound glass element | Paul Grether, Tina Grether, heir, Michael Grether | 1993-11-09 |
| 5237787 | Glazing element | Paul Grether, Tina Grether, heir, Michael Grether | 1993-08-24 |