Granted Patent
Utility
US 4,510,963 · App. 06/553,561
Proportional-flow electrohydraulic control
Inventors:
Glen T. Presley, Lloyd L. Lautzenhiser
Patented Case
View Patent ↗
Granted: Apr 16, 1985
Filed: Nov 21, 1983
Inventors
Glen T. Presley
Lloyd L. Lautzenhiser
Assignee (at issue)
Electro-Hydraulic Controls, Inc.
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.