Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8656671 | Floor systems | — | 2014-02-25 |
| 6688065 | Flooring construction | — | 2004-02-10 |
| 6073409 | Flooring construction with capacity for deflexure adjustment | — | 2000-06-13 |
| RE36452 | Composite seal for rotary cone rock bits | Robert G. Upton, Michael Hooper, Jerry Pyka, Gary R. Portwood, Randy Johnston | 1999-12-21 |
| 5362073 | Composite seal for rotary cone rock bits | Robert G. Upton, Michael F. Hooper, Gary R. Portwood, Jerry Pyka, Randy Johnston | 1994-11-08 |