Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6923423 | Small bore gate valve | Philip Hernandez, Archie L. Smith, David Cain, Gregory L. Glidden, Christopher D. Bartlett +2 more | 2005-08-02 |
| 6520207 | Combination poppet and gate valve | Christopher D. Bartlett, Christopher E. Cunningham, Addrew J. Canning, David Cain, Paulo Couto | 2003-02-18 |
| 6401747 | Gate valve | David Cain, Gregory L. Glidden | 2002-06-11 |
| D440283 | Gate valve | David Cain | 2001-04-10 |
| 6145594 | Gate valve for subsea completion system | — | 2000-11-14 |
| 5312087 | Low torque back seating stem for gate valve | — | 1994-05-17 |
| 4795128 | Gate type kelly cock valve | Igor Krasnov, Henry D. Calk, Jr., Billy L. McDougal | 1989-01-03 |
| 4629161 | Gate valve | Paul D. Bunch, Russell Stevens | 1986-12-16 |