Granted Patent
Utility
US 5,074,802 · App. 07/406,035
Pneumatic-electric quick disconnect connector for a plasma arc torch
Inventors:
Isaac Gratziani, Nicholas A. Sanders
Patented Case
View Patent ↗
Granted: Dec 24, 1991
Filed: Sep 12, 1989
Inventors
Isaac Gratziani
Nicholas A. Sanders
Assignee (at issue)
Hypertherm, 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.