Granted Patent
Utility
US 4,368,750 · App. 05/901,362
Ball-type feedback motor for servovalves
Inventor:
Robert Burton
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Apr 28, 1978
Inventor
Robert Burton
Assignee (at issue)
Sundstrand 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.