Granted Patent
Utility
US 4,771,220 · App. 06/824,132
Picture tube heater supply circuit
Inventor:
Klaus Reh
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Jan 30, 1986
Inventor
Klaus Reh
Assignee (at issue)
Standard Elektrik Lorenz AG
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.