Granted Patent
Utility
US 4,331,990 · App. 06/106,847
Flat coil linear actuator for multiple transducer arms
Inventor:
Jorgen Frandsen
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Dec 26, 1979
Inventor
Jorgen Frandsen
Assignee (at issue)
Burroughs, 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.