Granted Patent
Utility
US 4,654,496 · App. 06/598,661
Underwater oxy-arc cutting system using a non-thermic cutting rod
Inventors:
Peter L. DeMarsh, William W. Crawford
Patented Case
View Patent ↗
Granted: Mar 31, 1987
Filed: Apr 11, 1984
Inventors
Peter L. DeMarsh
William W. Crawford
Assignee (at issue)
Peter L. DeMarsh
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.