Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6003827 | Universal sign holder | Jack H. Kulp, John D. McKenney | 1999-12-21 |
| 5872715 | Automatic inspection and certification system | — | 1999-02-16 |
| 5868520 | Channelizer ballasting system using tire sidewalls | Brent M. Kulp, Jack H. Kulp | 1999-02-09 |
| 5755528 | Unitary stabilizing base | Jack H. Kulp | 1998-05-26 |
| 5732911 | Legless sign stand | Jack H. Kulp, Frank G. Cain | 1998-03-31 |
| 4531944 | Eye drop application aid | — | 1985-07-30 |