Granted Patent
Utility
US 4,866,242 · App. 07/014,974
Laser beam welding
Inventor:
David R. Martyr
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Feb 17, 1987
Inventor
David R. Martyr
Assignee (at issue)
British Shipbuilders
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.