Granted Patent
Utility
US 4,488,136 · App. 06/526,205
Combination transformer with common core portions
Inventors:
Irvin L. Hansen, Randall W. Haack
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Aug 23, 1983
Inventors
Irvin L. Hansen
Randall W. Haack
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.