Granted Patent
Utility
US 5,902,096 · App. 08/800,103
Diaphragm pump having multiple rigid layers with inlet and outlet check valves
Inventors:
Bruce E. Behringer, James A. Mawhirt
Patented Case
View Patent ↗
Granted: May 11, 1999
Filed: Feb 13, 1997
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.