IP Library › Granted Patent US 5,548,097
Granted Patent Utility
US 5,548,097 · App. 08/361,730

Plasma arc cutting torch ignition circuit and method providing a forced arc transfer function

Inventors: Richard W. Couch, Lifeng Luo, Jeffrey L. Peterson
Patented Case View Patent ↗
Granted: Aug 20, 1996 Filed: Dec 22, 1994
Inventors
Richard W. Couch
Lifeng Luo
Jeffrey L. Peterson
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,548,097
App. No.
08/361,730
Filed
1994-12-22
Granted
1996-08-20
Kind
A