Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4795128 | Gate type kelly cock valve | Igor Krasnov, Henry D. Calk, Jr., Taylor L. Jones | 1989-01-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4795128 | Gate type kelly cock valve | Igor Krasnov, Henry D. Calk, Jr., Taylor L. Jones | 1989-01-03 |