Granted Patent
Utility
US 4,852,546 · App. 07/226,730
Hair roller heating device
Inventor:
Thaddeus Zaborowski
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Aug 1, 1988
Inventor
Thaddeus Zaborowski
Assignee (at issue)
The Schawbel 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.