Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5226370 | Transit car door system and operation | Frederick E. Templeton, David L. Crawforth | 1993-07-13 |
| 5119739 | Transit car door system and operation | Frederick E. Templeton, David L. Crawforth | 1992-06-09 |
| 4981084 | Transit car door system and operation | Frederick E. Templeton, David L. Crawforth | 1991-01-01 |