Granted Patent
Utility
US 4,089,442 · App. 05/728,212
Accumulative pressure pump
Inventors:
Robert X. Hafele, Lewis C. LoMaglio
Patented Case
View Patent ↗
Granted: May 16, 1978
Filed: Sep 30, 1976
Inventors
Robert X. Hafele
Lewis C. LoMaglio
Assignee (at issue)
Ethyl 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.