Granted Patent
Utility
US 4,186,467 · App. 05/826,543
Welded thermoplastic stringer for slide fastener and method of manufacture
Inventor:
Charles Lawrence
Patented Case
View Patent ↗
Granted: Feb 5, 1980
Filed: Aug 22, 1977
Inventor
Charles Lawrence
Assignee (at issue)
Textron 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.