Granted Patent
Utility
US 4,831,292 · App. 07/199,979
Linear motor arrangement with center of mass balancing
Inventor:
Robert Berry
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: May 27, 1988
Inventor
Robert Berry
Assignee (at issue)
Hughes Aircraft 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.