Granted Patent
Utility
US 4,523,076 · App. 06/477,063
Automatic welding machine which provides uniform welding of a workpiece during vertical movement thereof
Inventor:
Charles R. Laymon
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Mar 21, 1983
Inventor
Charles R. Laymon
Assignee (at issue)
Welco Industries
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.