Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8893338 | Inflatable cellular mattress with alternating zones of inflated cells | J. David McCausland, Dennis L. Clapper | 2014-11-25 |
| 8739338 | Inflatable cushion valve and attachment apparatus | Dennis L. Clapper | 2014-06-03 |
| D663076 | Helmet liner | David K. Parsons, Anthony Eric Sprouse, II | 2012-07-03 |
| 6687936 | Valve for zoned cellular cushion | Robert W. Graebe, Robert Klotz, Dennis L. Clapper | 2004-02-10 |
| 6564410 | Valve for zoned cellular cushion | Robert W. Graebe, Robert Klotz | 2003-05-20 |