Granted Patent
Utility
US 4,976,709 · App. 07/374,958
Method for collagen treatment
Inventor:
Bruce J. Sand
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Jun 30, 1989
Inventor
Bruce J. Sand
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.