Granted Patent
Utility
US 4,132,071 · App. 05/840,602
Electro-hydraulic controlled valve actuator system
Inventors:
Werner K. Priese, Charles I. Koehlert
Patented Case
View Patent ↗
Granted: Jan 2, 1979
Filed: Oct 11, 1977
Inventors
Werner K. Priese
Charles I. Koehlert
Assignee (at issue)
Hills-McCanna Company
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.