Granted Patent
Utility
US 4,313,905 · App. 06/097,229
Blow molding method
Inventor:
Robert X. Hafele
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Nov 26, 1979
Inventor
Robert X. Hafele
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.