Granted Patent
Utility
US 4,620,296 · App. 06/676,146
Protection system for immunizing a controlled d-c power supply against a-c line voltage interruptions
Inventor:
Edward C. Siemon
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: Nov 29, 1984
Inventor
Edward C. Siemon
Assignee (at issue)
DANA LIMITED
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.