Granted Patent
Utility
US 4,252,233 · App. 06/045,107
Plastic bag-wicketing pin adjustment apparatus
Inventor:
Richard L. Joice
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Jun 4, 1979
Inventor
Richard L. Joice
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.