Granted Patent
Utility
US 4,101,754 · App. 05/730,605
Adjusting circuit for use in plasma arc cutting torch
Inventor:
Robert L. Fischer
Patented Case
View Patent ↗
Granted: Jul 18, 1978
Filed: Oct 7, 1976
Inventor
Robert L. Fischer
Assignee (at issue)
ACF Industries Incorporated
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.