| 5846833 |
Method and apparatus for testing a non-hydrocarbon refrigerant |
Warren Clough, John Attanasio, William A. Faris, H. Harvey Michels, David A. Condit |
1998-12-08 |
| D344527 |
Refrigerant recovery unit |
Thomas E. Drago, Richard J. Duell |
1994-02-22 |
| 5255527 |
Method of testing the purity of refrigerant flowing through a refrigeration system |
— |
1993-10-26 |
| 5247804 |
Method and apparatus for recovering and purifying refrigerant including liquid recovery |
Chester D. Ripka |
1993-09-28 |
| 5243828 |
Control system for compressor protection in a manually operated refrigerant recovery apparatus |
Richard J. Duell |
1993-09-14 |
| 5214931 |
Apparatus for sampling the purity of refrigerant in the storage container of a refrigerant recovery and purification system |
— |
1993-06-01 |
| 5181390 |
Manually operated refrigerant recovery apparatus |
Wayne B. Cavanaugh, Chester D. Ripka |
1993-01-26 |
| 5174124 |
Apparatus for sampling the purity of refrigerant flowing through a refrigeration circuit |
Chester D. Ripka |
1992-12-29 |
| 5146760 |
Method and apparatus for compressor protection in a refrigerant recovery system |
— |
1992-09-15 |
| 5146761 |
Method and apparatus for recovering refrigerant |
Wayne B. Cavanaugh |
1992-09-15 |
| 5127232 |
Method and apparatus for recovering and purifying refrigerant |
Chester D. Ripka |
1992-07-07 |
| 5081846 |
Control of space heating and water heating using variable speed heat pump |
Kevin F. Dudley, Kevin B. Dunshee |
1992-01-21 |
| 5052186 |
Control of outdoor air source water heating using variable-speed heat pump |
Kevin F. Dudley, Kevin B. Dunshee, Roger J. Voorhis |
1991-10-01 |
| 5050394 |
Controllable variable speed heat pump for combined water heating and space cooling |
Kevin F. Dudley, Kevin B. Dunshee |
1991-09-24 |