Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5787864 | Hydrogen enriched natural gas as a motor fuel with variable air fuel ratio and fuel mixture ratio control | Robert L. Hoekstra, David Neal Mulligan, Douglas Edward Hahn | 1998-08-04 |
| D384669 | Remote control accessory | — | 1997-10-07 |
| 5666923 | Hydrogen enriched natural gas as a motor fuel with variable air fuel ratio and fuel mixture ratio control | Robert L. Hoekstra, David Neal Mulligan, Douglas Edward Hahn | 1997-09-16 |
| 5660602 | Hydrogen enriched natural gas as a clean motor fuel | Robert L. Hoekstra, David Neal Mulligan, Douglas Edward Hahn | 1997-08-26 |
| 5505917 | Solar heat exchanger and concentric feedback tube system for disinfecting water | — | 1996-04-09 |
| 4729774 | Nonuniform regeneration system for desiccant bed | Barry M. Cohen, Andy H. Levine, Francis A. DiBella | 1988-03-08 |