Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5924300 | Modular self contained air conditioning unit | Walter Earhart, Jr., William A. Smiley, III, Dwayne L. Johnson, Mark E. Smith | 1999-07-20 |
| 5829267 | Fresh air inlet and damper | Walter Earhart, Jr., William A. Smiley III, Dennis R. Dorman | 1998-11-03 |
| 5787721 | Easily removable drain pan and funnel arrangement | Dwayne L. Johnson | 1998-08-04 |