IP Library Granted Patent US 5,307,256
Granted Patent Utility
US 5,307,256 · App. 07/991,766

Trickle charge circuit for an off-line switching power supply

Inventor: Robert A. Silverstein
Patented Case View Patent ↗
Granted: Apr 26, 1994 Filed: Dec 17, 1992
Inventor
Robert A. Silverstein

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.

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Quick Facts
Patent No.
US 5,307,256
App. No.
07/991,766
Filed
1992-12-17
Granted
1994-04-26
Kind
A