Granted Patent
Utility
US 4,356,703 · App. 06/174,243
Refrigeration defrost control
Inventor:
Kenneth E. Vogel
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Jul 31, 1980
Inventor
Kenneth E. Vogel
Assignee (at issue)
McQuay-Perfex Inc.
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.