Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4679353 | Security door | George Langenbach | 1987-07-14 |
| 4602460 | Water powered gutter and downspout cleaning apparatus | — | 1986-07-29 |
| 4563110 | Shoring apparatus and method | George Langenbach | 1986-01-07 |