Granted Patent
Utility
US 4,673,888 · App. 06/903,288
Power control system
Inventors:
Rudolph H. Engelmann, Thad Early
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Sep 2, 1986
Inventors
Rudolph H. Engelmann
Thad Early
Assignee (at issue)
Electro-Voice, 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.