Granted Patent
Utility
US 4,771,878 · App. 06/522,946
Pusher cylinder
Inventors:
David Braithwaite, Richard Walker, Daniel W. Wartschow
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Aug 12, 1983
Inventors
David Braithwaite
Richard Walker
Daniel W. Wartschow
Assignee (at issue)
Emhart Industries, 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.