Granted Patent
Utility
US 4,403,404 · App. 06/308,314
Method of making a cellulose-free transformer coils
Inventor:
Dean C. Westervelt
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Oct 2, 1981
Inventor
Dean C. Westervelt
Assignee (at issue)
Westinghouse Electric Company 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.