Granted Patent
Utility
US 4,644,126 · App. 06/681,721
Method for producing parallel-sided melt zone with high energy beam
Inventor:
Berthold W. Schumacher
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Dec 14, 1984
Inventor
Berthold W. Schumacher
Assignee (at issue)
Ford Motor 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.