Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6368041 | Drum elevator system | Charles Gary Atwell, Ricky N. Cooper, Martin T. Garthaffner, Andrew Gillespie, Ronald D. Honaker +1 more | 2002-04-09 |
| 6123201 | Drum elevator system | Charles Gary Atwell, Ricky N. Cooper, Martin T. Garthaffner, Andrew Gillespie, Ronald D. Honaker +1 more | 2000-09-26 |
| 4666550 | Apparatus for producing a strip of laminated sheet material | Steven F. Spiers, Harold T. Hinson, Gregory A. Shelton, Everett C. Grollimund | 1987-05-19 |
| 4517825 | Self-cleaning porosimeter | Everett C. Grollimund, Donald Brookman | 1985-05-21 |