Granted Patent
Utility
US 4,450,691 · App. 06/435,286
Frost detecting device
Inventor:
John H. Taylor
Patented Case
View Patent ↗
Granted: May 29, 1984
Filed: Oct 19, 1982
Inventor
John H. Taylor
Assignee (at issue)
Dectron
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.