Granted Patent
Utility
US 4,672,973 · App. 06/767,078
Device and method for determining skin type
Inventor:
Fred Hofke
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Aug 20, 1985
Inventor
Fred Hofke
Assignee (at issue)
Revlon
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.