Granted Patent
Utility
US 4,858,481 · App. 07/192,032
Position controlled linear actuator
Inventor:
William Abraham
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: May 9, 1988
Inventor
William Abraham
Assignee (at issue)
Brunswick Valve & Control, 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.