Granted Patent
Utility
US 4,952,360 · App. 07/197,156
Method of making microwave-heatable hair curlers
Inventor:
Robert M. Gibbon
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: May 23, 1988
Inventor
Robert M. Gibbon
Assignee (at issue)
JMK International, 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.