Granted Patent
Utility
US 5,669,764 · App. 08/549,958
Pneumatic diaphragm pump
Inventors:
Bruce E. Behringer, James A. Mawhirt
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Oct 30, 1995
Inventors
Bruce E. Behringer
James A. Mawhirt
Assignee (at issue)
Bayer Aktiengesellschaft
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.