Granted Patent
Utility
US 4,474,540 · App. 06/416,610
Tubular diaphragm pump
Inventors:
James V. Bonastia, Daniel Sugarman
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Sep 10, 1982
Inventors
James V. Bonastia
Daniel Sugarman
Assignee (at issue)
Pennwalt Corporation
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.