Granted Patent
Utility
US 4,187,408 · App. 05/788,452
Method for laser seam welding of moving workpieces
Inventor:
Robert F. Heile
Patented Case
View Patent ↗
Granted: Feb 5, 1980
Filed: Apr 20, 1977
Inventor
Robert F. Heile
Assignee (at issue)
Union Carbide Corporation
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.