Granted Patent
Utility
US 4,907,589 · App. 07/188,272
Automatic over-temperature control apparatus for a therapeutic heating device
Inventor:
Eric R. Cosman
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Apr 29, 1988
Inventor
Eric R. Cosman
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.