Granted Patent
Utility
US 6,339,320 · App. 09/555,991
Power transformer for a switched mode power supply, especially for stud welding devices
Inventors:
Danilo Spremo, Martin Perschke
Patented Case
View Patent ↗
Granted: Jan 15, 2002
Filed: Sep 13, 2000
Inventors
Danilo Spremo
Martin Perschke
Assignee (at issue)
NELSON STUD WELDING, 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.