Granted Patent
Utility
US 6,715,304 · App. 10/310,543
Universal refrigerant controller
Inventor:
Lyman W. Wycoff
Patented Case
View Patent ↗
Granted: Apr 6, 2004
Filed: Dec 5, 2002
Inventor
Lyman W. Wycoff
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.