Granted Patent
Utility
US 6,000,581 · App. 08/941,456
Dispenser gun for viscous or semi-viscous products
Inventor:
Keith F. Woodruff
Patented Case
View Patent ↗
Granted: Dec 14, 1999
Filed: Sep 30, 1997
Inventor
Keith F. Woodruff
Assignee (at issue)
American Cyanamid 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.