Granted Patent
Utility
US 5,128,504 · App. 07/511,746
Removable heating article for use in alternating magnetic field
Inventors:
Thomas H. McGaffigan, Ernest Fenton
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Apr 20, 1990
Inventors
Thomas H. McGaffigan
Ernest Fenton
Assignee (at issue)
Metcal, 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.