Granted Patent
Utility
US 4,230,298 · App. 06/005,958
Apparatus for the preparation of hollow plastic articles
Inventor:
Emery I. Valyi
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: Jan 24, 1979
Inventor
Emery I. Valyi
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.