Granted Patent
Utility
US 4,714,820 · App. 06/768,264
Electrically heated curling wrapper
Inventors:
Herbert M. Morrison, Jorge Del Mar
Patented Case
View Patent ↗
Granted: Dec 22, 1987
Filed: Aug 22, 1985
Inventors
Herbert M. Morrison
Jorge Del Mar
Assignee (at issue)
Clairol Incorporated
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.