Granted Patent
Utility
US 4,455,512 · App. 06/371,426
System for linear motor control
Inventors:
William J. Cornwell, Tex M. Dudley, William H. Lee
Patented Case
View Patent ↗
Granted: Jun 19, 1984
Filed: Apr 23, 1982
Inventors
William J. Cornwell
Tex M. Dudley
William H. Lee
Assignee (at issue)
Federal Signal 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.