Granted Patent
Utility
US 4,331,493 · App. 06/183,884
Method of manufacturing welded thermoplastic stringer
Inventor:
Charles Lawrence
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Sep 4, 1980
Inventor
Charles Lawrence
Assignee (at issue)
Talon, Inc.
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.