Granted Patent
Utility
US 4,646,529 · App. 06/822,181
Transport refrigeration unit defrost control system
Inventor:
Jay L. Hanson
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Jan 24, 1986
Inventor
Jay L. Hanson
Assignee (at issue)
THERMO KING LLC
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.