Granted Patent
Utility
US 4,226,577 · App. 06/054,421
Apparatus for injection molding of continuous slide fastener chain
Inventor:
Mitsuo Sawada
Patented Case
View Patent ↗
Granted: Oct 7, 1980
Filed: Jul 3, 1979
Inventor
Mitsuo Sawada
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.