Granted Patent
Utility
US 4,500,829 · App. 06/538,391
Advance and retard phase-shift transformer
Inventors:
Theodore R. Specht, Edward J. Cham
Patented Case
View Patent ↗
Granted: Feb 19, 1985
Filed: Oct 3, 1983
Inventors
Theodore R. Specht
Edward J. Cham
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.