Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6835307 | Thermal water treatment | Darrell D. Paul, Stephen M. Millett, David P. Evers, James E. Dvorsky, Paul E. George, II +3 more | 2004-12-28 |
| RE37389 | Appliance for improved venting | Allen L. Rutz, James H. Saunders | 2001-09-25 |
| 6112741 | Mid-efficiency furnace with multiple venting option | George Stickford, Terry Merriman, Allen L. Rutz, James H. Saunders, David Alexander Ball +1 more | 2000-09-05 |
| 6109339 | Heating system | David Alexander Ball, Jan B. Yates, Stephen E. Petty, Steve Grimes | 2000-08-29 |
| 5941230 | Appliance for improved venting | Allen L. Rutz, James H. Saunders | 1999-08-24 |
| 5687908 | Non-condensing dual temperature combination space heating and hot water system | Ronald A. Cudnik, Jeffrey J. Crisafulli | 1997-11-18 |
| 5097819 | Dispersed bubble condensation | Anthony C. DeVuono, Richard N. Christensen, Paul E. George, II | 1992-03-24 |
| 5020320 | Engine driven heat pump system | Frank E. Jakob | 1991-06-04 |
| 4768444 | Common vent device for positive vent pressure and draft hood equipped gas appliances | Douglas W. DeWerth, James R. Deppisch, Ronald A. Cudnik | 1988-09-06 |
| 4557253 | Solar collector employing conventional siding, and air distribution system therefor | Lawrence J. Flanigan, John M. Corliss, John Hagopian, Thomas P. Nunheimer | 1985-12-10 |
| 4470405 | Method and apparatus for controlling insolation in a building | D. Karl Landstrom, William H. Wilkinson, George Stickford, Frank E. Jakob | 1984-09-11 |
| 4263890 | Flue restrictor | John W. Turko, Maurice N. Day, Linda Deschere, Howard B. Pritz, Larry E. Schluer +2 more | 1981-04-28 |
| 4188172 | Method and means for injecting hot liquid when pumping cold liquid | Thomas A. Klausing, Jan B. Yates | 1980-02-12 |