Granted Patent
Utility
US 6,401,244 · App. 09/805,793
Welding helmet and face plate
Inventors:
Rafael Kramer, James D. TerMeer
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Mar 13, 2001
Inventors
Rafael Kramer
James D. TerMeer
Assignee (at issue)
Sellstrom Manufacturing Company
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.