Granted Patent
Utility
US 4,725,717 · App. 07/013,677
Impact-resistant electrical heating pad with antistatic upper and lower surfaces
Inventor:
John M. Harrison
Patented Case
View Patent ↗
Granted: Feb 16, 1988
Filed: Feb 12, 1987
Inventor
John M. Harrison
Assignee (at issue)
COLLINS & AIKMAN CORPORATION
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.