Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4594665 | Well production control system | Rangasami S. Chandra, Stephen G. Quen, Jorge E. Lastra | 1986-06-10 | $1,542,000 |
| 4509365 | Method and apparatus for weighing a sucker-rod pumped well | Rangasami S. Chandra, James M. Tucci | 1985-04-09 | $5,392,000 |
| 4274783 | Chain measuring and conveyor control system | Barclay J. Tullis | 1981-06-23 | $2,359,000 |
| 4198758 | Chain measuring and conveyor control system | Barclay J. Tullis | 1980-04-22 | $2,004,000 |