Granted Patent
Utility
US 4,808,477 · App. 07/112,845
Urethane modified nylon magnet wire enamel
Inventor:
Joseph J. Harber
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Oct 23, 1987
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.