Granted Patent
Utility
US 5,357,419 · App. 08/121,693
Compact and efficient transformerless power conversion system
Inventor:
Rudolf Limpaecher
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Sep 15, 1993
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.