Granted Patent
Utility
US 4,889,002 · App. 07/180,161
Anti-lockup drive mechanism for a position controlled linear actuator
Inventor:
William Abraham
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Apr 11, 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.