Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D392686 | Sign stand with rolling base | David J. Muir, David U. Hillstrom | 1998-03-24 |
| 5442871 | Poster and sign display assembly | David J. Muir, David U. Hillstrom | 1995-08-22 |
| D360078 | Wall mounted sign frame | David J. Muir, David U. Hillstrom | 1995-07-11 |
| D351863 | Free standing sign stand | David J. Muir, David U. Hillstrom | 1994-10-25 |
| 5340068 | Release mechanism for locking pivotable leg | James J. Mason, David J. Muir | 1994-08-23 |
| 4519152 | Tamper proof poster display device | James R. Seely | 1985-05-28 |
| 4288053 | Adjustable sign mounting bracket | — | 1981-09-08 |
| 4265040 | Two-sided display devices | — | 1981-05-05 |