Granted Patent
Utility
US 4,190,065 · App. 05/825,638
Exothermic hair curler
Inventor:
Walter J. Kulpa
Patented Case
View Patent ↗
Granted: Feb 26, 1980
Filed: Aug 18, 1977
Inventor
Walter J. Kulpa
Assignee (at issue)
Remington Products Company
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.