Granted Patent
Utility
US 4,634,832 · App. 06/601,424
Laser-beamwelding
Inventor:
David R. Martyr
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Apr 18, 1984
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.