Granted Patent
Utility
US 4,352,777 · App. 06/120,266
Method for forming hollow plastic objects
Inventor:
Emery I. Valyi
Patented Case
View Patent ↗
Granted: Oct 5, 1982
Filed: Feb 11, 1980
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.