Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5136799 | Automatic open and close sign | George Spector | 1992-08-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5136799 | Automatic open and close sign | George Spector | 1992-08-11 |