Granted Patent
Utility
US 4,549,853 · App. 06/595,808
Positive displacement pump output monitor
Inventors:
Kenneth E. Gasper, RAYMOND EHRHART
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: Apr 2, 1984
Inventors
Kenneth E. Gasper
RAYMOND EHRHART
Assignee (at issue)
Olin 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.