Granted Patent
Utility
US 5,416,458 · App. 07/691,209
Power distribution transformer for non-linear loads
Inventors:
Wallace W. Menke, Frank B. Croft, John J. Nay
Patented Case
View Patent ↗
Granted: May 16, 1995
Filed: Apr 25, 1991
Inventors
Wallace W. Menke
Frank B. Croft
John J. Nay
Assignee (at issue)
Federal Signal Corporation
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.