Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7989402 | Functionalized clay compositions for aqueous based drilling fluids | David Dino | 2011-08-02 |
| 7941669 | Method and apparatus for enabling a user to select an authentication method | Rick D. Johnson, Anant Nambiar | 2011-05-10 |