Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6561270 | Plug and plug set for use in wellbore | — | 2003-05-13 |
| 6419015 | Apparatus and a method for launching plugs | Guus Veersteeg | 2002-07-16 |
| 6082451 | Wellbore shoe joints and cementing systems | Richard L. Giroux, Erik P. Eriksen, Frederick T. Tilton | 2000-07-04 |
| 6056053 | Cementing systems for wellbores | Richard L. Giroux | 2000-05-02 |
| 5909771 | Wellbore valve | Richard L. Giroux | 1999-06-08 |
| 5836395 | Valve for wellbore use | — | 1998-11-17 |
| 5813457 | Wellbore cementing system | Richard L. Giroux | 1998-09-29 |
| 5787979 | Wellbore cementing system | Richard L. Giroux | 1998-08-04 |
| 5690177 | Fill valve | — | 1997-11-25 |
| 5680902 | Wellbore valve | Richard L. Giroux | 1997-10-28 |
| 5669443 | Shoe for used in the construction of oil and gas wells | Guus Versteeg | 1997-09-23 |
| 5553667 | Cementing system | Richard L. Giroux | 1996-09-10 |
| 5511618 | Fill valve | — | 1996-04-30 |
| 5450903 | Fill valve | — | 1995-09-19 |
| 5390736 | Anti-rotation devices for use with well tools | — | 1995-02-21 |
| 4957678 | Method of molding a pipe end protector | — | 1990-09-18 |
| 4854350 | Pipe-end protector | — | 1989-08-08 |