Granted Patent
Utility
US 3,958,894 · App. 05/543,060
Fluid pumping assembly of a molded synthetic material
Inventors:
William N. Rowley, Gordon F. Ehret
Patented Case
View Patent ↗
Granted: May 25, 1976
Filed: Jan 22, 1975
Inventors
William N. Rowley
Gordon F. Ehret
Assignee (at issue)
Weil-McLain
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.