Granted Patent
Utility
US 4,725,458 · App. 06/945,160
Urethane modified nylon magnet wire enamel
Inventor:
Joseph J. Harber
Patented Case
View Patent ↗
Granted: Feb 16, 1988
Filed: Dec 22, 1986
Inventor
Joseph J. Harber
Assignee (at issue)
Essex Group LLC
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.