Granted Patent
Utility
US 4,706,875 · App. 06/930,400
Vending and reclosure device for powder and granular products
Inventor:
Stephen M. Blackman
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Nov 14, 1986
Inventor
Stephen M. Blackman
Assignee (at issue)
Federal Paper Board Co., Inc.
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.