Granted Patent
Utility
US 4,432,540 · App. 06/231,593
Mail sorting machine with improved conveyor and envelope separating device
Inventors:
Roy Akers, Charles R. Hartman, Keith Deutch
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: Feb 5, 1981
Inventors
Roy Akers
Charles R. Hartman
Keith Deutch
Assignee (at issue)
Bell and Howell, LLC
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.