Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5014218 | Using a remote control computer connected to a vocal control computer and a monitor computer | Stephen F. Crain, Mark A. Clark | 1991-05-07 |
| 4953097 | Process control system using remote computer and local site control computers for mixing a proppant with a fluid | Stephen F. Crain, Mark A. Clark | 1990-08-28 |
| 4916631 | Process control system using remote computer and local site control computers for mixing a proppant with a fluid | Stephen F. Crain, Mark A. Clark | 1990-04-10 |
| 4751648 | Local area network data transfer system | Leslie R. Sears, III, Alan J. Pitts, Stephen F. Crain, Michael L. Green, Don M. Roberts +2 more | 1988-06-14 |