Issued Patents All Time
Showing 25 most recent of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11248825 | Tank temperature probe with positional sensor | — | 2022-02-15 |
| 10006682 | System and method for venting refrigerant from an air conditioning system | Mark McMasters | 2018-06-26 |
| 9464834 | Temperature controlled service hoses for improved refrigerant charge accuracy | — | 2016-10-11 |
| 9366465 | System and method for improving charge accuracy by temperature compensation | Mark McMasters, William Brown | 2016-06-14 |
| 8733114 | Method and apparatus for refrigerant recovery unit filter dryer maintenance | Travis Bakker | 2014-05-27 |
| 8661836 | Apparatus to clear oil from the hoses and front end of a recovery recharge machine | Mark McMasters, William Brown | 2014-03-04 |
| 8616011 | Internal clearing function for a refrigerant recovery/recharge machine | William Brown | 2013-12-31 |
| 8590335 | Method and apparatus for clearing oil inject circuit for changing oil types | William Brown, Mark McMasters | 2013-11-26 |
| 8572992 | Method for recovery and recharge of blend refrigerants with blend sent for reclamation | Mark McMasters, William Brown | 2013-11-05 |
| 8272228 | Apparatus to clear oil from the hoses and front end of a recovery recharge machine | Mark McMasters, William Brown | 2012-09-25 |
| 8261564 | Refrigerant recovery apparatus with variable vacuum time and method | William Brown | 2012-09-11 |
| 8122731 | Method and apparatus for clearing oil inject circuit for changing oil types | Mark McMasters, William Brown | 2012-02-28 |
| 7854130 | Internal clearing function for a refrigerant recovery/recharge machine | William Brown | 2010-12-21 |
| 7726137 | Method and apparatus for refrigerant recovery unit filter dryer maintenance | Travis Bakker | 2010-06-01 |
| 7082814 | Method and apparatus for testing fluid flow and flushing a transmission cooler | Tim Gorski, Bill Brown, Walter D. Murray, Larry Lageson, Scott Opsahl | 2006-08-01 |
| 6138462 | Refrigerant recovery and recharging system with automatic oil drain | Walter D. Murray, William Brown | 2000-10-31 |
| 6134899 | Refrigerant recovery and recharging system with automatic air purging | William Brown, Walter D. Murray | 2000-10-24 |
| 6134896 | Background tank fill | William Brown, Walter D. Murray, Mark D. Pfleeger | 2000-10-24 |
| 6119475 | Tank unload apparatus | William Brown, Walter D. Murray | 2000-09-19 |
| 5603223 | Refrigerant handling with lubricant separation and draining | Walter D. Murray, Kenneth W. Manz | 1997-02-18 |
| 5551247 | Refrigerant handling system and method especially for flammable and potentially flammable refrigerants | Kenneth W. Manz, Allan F. Heisler, II, Walter D. Murray, Daniel L. Olds | 1996-09-03 |
| 5493869 | Recovery of at least two different and incompatible refrigerant types | Roger D. Shirley, Kenneth W. Manz | 1996-02-27 |
| 5209653 | Vacuum pump | Harold E. Lyons, Richard Parks | 1993-05-11 |
| 5193351 | Refrigerant recovery and purification system | Gregg E. Laukhuf, Walter D. Murray, Todd J. Arend | 1993-03-16 |
| 5158747 | Apparatus for identifying and distinguishing different refrigerants | Kenneth W. Manz, Charles E. Dull | 1992-10-27 |