Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5489041 | Non-metallic obround blanking hatch apparatus | James F. Matthews, Brett L. Muckelrath | 1996-02-06 |
| 5364012 | Method of producing metal encapsulated plastic tank systems | Joe B. Kersey | 1994-11-15 |
| 5353944 | Non-metallic hatch apparatus | James F. Matthews | 1994-10-11 |
| 5292012 | Tank handling and protection structure | Brett L. Muckelrath | 1994-03-08 |
| 5180190 | Damage-resistant containment device | Joe B. Kersey | 1993-01-19 |
| 4919540 | Self-leveling mixer apparatus | Calvin L. Stegemoeller | 1990-04-24 |
| 4872794 | Tank mounting apparatus | Robert L. Baker | 1989-10-10 |
| 4854714 | Blender vehicle apparatus | Robert L. Baker, Dale E. Bragg, Calvin L. Stegemoeller | 1989-08-08 |
| 4850701 | Skid-mounted self-leveling mixer apparatus | Calvin L. Stegemoeller, Lonnie R. Walker | 1989-07-25 |
| 4802141 | Self-leveling mixer with mechanical agitation | Calvin L. Stegemoeller | 1989-01-31 |
| 4701095 | Transportable material conveying apparatus | Leslie N. Berryman, Herbert J. Horinek | 1987-10-20 |
| 4311395 | Pivoting skid blender trailer | John L. Douthitt | 1982-01-19 |