Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9322595 | Method and apparatus for conditioning of fracturing sand | — | 2016-04-26 |
| 4945657 | Rotary drum dryer with improved premixing assembly | Andrew D. Livingston | 1990-08-07 |
| 4894930 | Rotary drum dryer with nonconducting nonstick surface | — | 1990-01-23 |
| 4802288 | Rotary drum dryer and method | Andrew D. Livingston | 1989-02-07 |
| 4729176 | Rotary drum dryer and method | Andrew D. Livingston | 1988-03-08 |