Granted Patent
Utility
US 3,937,459 · App. 05/506,526
Sorting machine
Inventor:
Frederick J. Lawrence
Patented Case
View Patent ↗
Granted: Feb 10, 1976
Filed: Sep 16, 1974
Inventor
Frederick J. Lawrence
Assignees (at issue)
Keith Stewart
Peter Shea
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.