Granted Patent
Utility
US 4,896,016 · App. 07/341,838
Plasma arc metal cutting apparatus with actuation spring
Inventors:
Daniel M. Broberg, Terry A. Prentice
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: Apr 24, 1989
Inventors
Daniel M. Broberg
Terry A. Prentice
Assignee (at issue)
Scepter Manufacturing, LLC.
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.