Granted Patent
Utility
US 4,638,557 · App. 06/821,975
Semi-automatic apparatus for attaching flypieces to a slide fastener chain
Inventor:
Sisir K. Sen Gupta
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Jan 24, 1986
Inventor
Sisir K. Sen Gupta
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.