Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11220883 | Retrievable back pressure valve and method of using same | Belo Kellam, Leslie Howell | 2022-01-11 |
| 10626701 | Retrievable back pressure valve and method of using same | Belo Kellam, Leslie Howell | 2020-04-21 |
| 10113391 | Retrievable back pressure valve and method of using same | Belo Kellam, Leslie Howell | 2018-10-30 |
| 9863213 | Retrievable back pressure valve and method of using same | Belo Kellam, Leslie Howell | 2018-01-09 |
| 4637899 | Corrosion inhibitors for cleaning solutions | — | 1987-01-20 |
| 4629570 | Removal of iron from chelant solutions | — | 1986-12-16 |
| 4493775 | Method and composition for corrosion | M. Dewayne Coffey, Mary Y. Kelly | 1985-01-15 |