Granted Patent
Utility
US 4,563,268 · App. 06/658,631
Method of discharging particles from a vibrating filter screen
Inventor:
Gregory A. Smith
Patented Case
View Patent ↗
Granted: Jan 7, 1986
Filed: Oct 9, 1984
Inventor
Gregory A. Smith
Assignee (at issue)
Polysar Financial Services S.A.
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.