Granted Patent
Utility
US 4,656,452 · App. 06/796,419
Transformer telephone influence tractor core shunt
Inventors:
Charles M. Martin, Wayne W. Lien
Patented Case
View Patent ↗
Granted: Apr 7, 1987
Filed: Nov 8, 1985
Inventors
Charles M. Martin
Wayne W. Lien
Assignee (at issue)
RTE 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.