Granted Patent
Utility
US 5,959,705 · App. 08/623,972
Welding lens with integrated display, switching mechanism and method
Inventor:
John D. Fergason
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Mar 29, 1996
Inventor
John D. Fergason
Assignee (at issue)
OSD Envizion, 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.