Granted Patent
Utility
US 4,922,397 · App. 07/307,138
Apparatus and method for a quasi-resonant DC to DC bridge converter
Inventor:
Albert M. Heyman
Patented Case
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Granted: May 1, 1990
Filed: Feb 6, 1989
Inventor
Albert M. Heyman
Assignee (at issue)
Digital Equipment 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.