Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6428238 | Road marker collar | — | 2002-08-06 |
| 6200064 | Road marker with collar | — | 2001-03-13 |
| 6116812 | Snowplowable pavement marker | — | 2000-09-12 |
| D426169 | Snowplowable pavement marker | — | 2000-06-06 |
| 5975794 | Snowplowable pavement marker | — | 1999-11-02 |
| 5564854 | Snowplowable road marker | — | 1996-10-15 |
| 5502593 | Compact pavement marker | — | 1996-03-26 |
| D348411 | Pavement marker | — | 1994-07-05 |
| D346984 | Pavement marker | — | 1994-05-17 |
| 5308186 | Snowplowable road marker | — | 1994-05-03 |
| 5240719 | One piece safety cap molding apparatus | — | 1993-08-31 |
| D327230 | Snowplowable guard member for pavement markers | — | 1992-06-23 |
| 5098217 | Abrasion resistant coating for pavement marker | Douglas Forrer | 1992-03-24 |
| 5061114 | Reflective pavement marker and method of apparatus for making same | — | 1991-10-29 |
| 5053182 | One piece safety cap molding apparatus and method | — | 1991-10-01 |
| 5002424 | Reflective pavement marker with inclined reinforcing ribs | — | 1991-03-26 |
| 4883384 | Protective roadway marker guard rails | — | 1989-11-28 |
| 4444327 | Tight vial assembly with one-piece cap | — | 1984-04-24 |
| 4319690 | Child-resistant closure and container assembly including improved outer cap | Stewart H. Birrell | 1982-03-16 |