Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5743257 | Dual valve, anesthesia machine having same, and method for using same | James Donaldson | 1998-04-28 |
| 5568910 | Anesthesia machine | James Donaldson | 1996-10-29 |
| 4452656 | Method and apparatus for making plastic screen panels | Henry E. Benson | 1984-06-05 |
| 4428423 | Well screen end fitting assembly and method of making same | Bernard M. Hanson | 1984-01-31 |
| 4374169 | Abrasion resistant, reinforced screen panel member | Gregory A. Gryskiewicz | 1983-02-15 |
| 4200218 | Method of attaching fittings to a cylindrical well screen | — | 1980-04-29 |