Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4594665 | Well production control system | Rangasami S. Chandra, Stephen G. Quen, Jorge E. Lastra | 1986-06-10 |
| 4509365 | Method and apparatus for weighing a sucker-rod pumped well | Rangasami S. Chandra, James M. Tucci | 1985-04-09 |
| 4274783 | Chain measuring and conveyor control system | Barclay J. Tullis | 1981-06-23 |
| 4198758 | Chain measuring and conveyor control system | Barclay J. Tullis | 1980-04-22 |