Granted Patent
Utility
US 5,270,913 · App. 07/864,031
Compact and efficient transformerless power conversion system
Inventor:
Rudolf Limpaecher
Patented Case
View Patent ↗
Granted: Dec 14, 1993
Filed: Apr 6, 1992
Inventor
Rudolf Limpaecher
Assignee (at issue)
D.C. Transformation, 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.