Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7153057 | Securable temporary manhole cover | — | 2006-12-26 |
| 7124693 | Railway car outlet gate assembly | — | 2006-10-24 |
| 6571718 | Railway car outlet gate assembly | — | 2003-06-03 |
| 6286437 | Railway car outlet gate assembly | — | 2001-09-11 |
| 6073562 | Railway car outlet gate assembly with compact inertial latch | Claud W. Cozine | 2000-06-13 |
| 6012397 | Railway car outlet gate assembly with inertial latch | Todd A. Krahl, Allen Smith | 2000-01-11 |
| 5671684 | Railway car outlet gate assembly with automatic lock | — | 1997-09-30 |
| 5584251 | Railway car outlet gate assembly with automatic lock | — | 1996-12-17 |
| 5272987 | Lock for railway hopper car unloading gate | — | 1993-12-28 |