Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5026168 | Slurry mixing apparatus | Leslie N. Berryman, Herbert J. Horinek, Max L. Phillippi, Vincent G. Reidenbach, Stanley V. Stephenson | 1991-06-25 |
| 4989987 | Slurry mixing apparatus | Leslie N. Berryman, Herbert J. Horinek, Max L. Phillippi, Vincent G. Reidenbach, Stanley V. Stephenson | 1991-02-05 |
| 4930576 | Slurry mixing apparatus | Leslie N. Berryman, Herbert J. Horinek, Max L. Phillippi, Vincent G. Reidenbach, Stanley V. Stephenson | 1990-06-05 |
| 4850750 | Integrated blending control system | Randall B. Cogbill, Timothy James Dodd, Paul W. Heilman, Daryl L. Heronemus, Leslie R. Sears, III +7 more | 1989-07-25 |
| 4715721 | Transportable integrated blending system | Lonnie R. Walker, Leslie N. Berryman, Larry Edwin Guffee, David E. Ripley | 1987-12-29 |