Granted Patent
Utility
US 5,206,539 · App. 07/792,893
Transformer with cancellation of harmonic currents by phase shited secondary windings
Inventor:
John B. Kammeter
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Nov 15, 1991
Inventor
John B. Kammeter
Assignee (at issue)
POWER DISTRIBUTION, INC.
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.