Granted Patent
Utility
US 4,528,824 · App. 06/639,420
Frozen drink apparatus
Inventor:
John Michael Herbert
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Aug 10, 1984
Inventor
John Michael Herbert
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.