Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6691898 | Push button foam dispensing device | Paul Hurray, Frank Leyshon | 2004-02-17 |
| 6123649 | Resistance apparatus for connection to a human body | R. Clayton Lee | 2000-09-26 |
| 5927229 | Visual aid system for the hitch attachment of a motor vehicle to a trailer | — | 1999-07-27 |
| 5657751 | Cardiopulmonary resuscitation unit | — | 1997-08-19 |
| RE33199 | Temperature resistant joint packing with E-shaped spring seal | — | 1990-04-17 |
| 4643390 | Fail-safe valve actuator | John M. Zwiegel | 1987-02-17 |
| 4612983 | Shear type gate valve | — | 1986-09-23 |
| 4570659 | Fire resistant valve | — | 1986-02-18 |
| 4569503 | Valve with remote and manual actuation means | — | 1986-02-11 |
| 4534235 | Rotary stepper actuator | John P. Mitcham | 1985-08-13 |
| 4477085 | Fire resistant connections embodying heat transfer means | Charles D. Bridges, Bert L. Morrison | 1984-10-16 |
| 4452462 | Temperature resistant joint packing with E-shaped spring seal | — | 1984-06-05 |
| 4436316 | Fluid seal | — | 1984-03-13 |