Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5466088 | Vehicle barrier having a pivotal vehicle barricade and a cooperating pivotal signal barrier | — | 1995-11-14 |
| 5288164 | Combined vehicle barrier | — | 1994-02-22 |
| 5228237 | Vehicle barrier | — | 1993-07-20 |
| 4850737 | Hydraulic spring vehicle barricade and hydraulic circuit therefor | James H. Smith | 1989-07-25 |
| 4826349 | Underground vehicle barricade | — | 1989-05-02 |
| 4818136 | Hydraulic vehicle barricade and method | Michael Lippy | 1989-04-04 |
| 4630395 | Portable vehicle barricade or portable maximum security barrier | — | 1986-12-23 |
| 4574523 | Vehicle barricade or maximum security barrier | — | 1986-03-11 |