Granted Patent
Utility
US 4,480,984 · App. 06/530,456
Apparatus for heat-shrinking thermoplastic sleeves about glass containers
Inventors:
Frank J. DiFrank, Fred L. Wallington
Patented Case
View Patent ↗
Granted: Nov 6, 1984
Filed: Sep 9, 1983
Inventors
Frank J. DiFrank
Fred L. Wallington
Assignee (at issue)
Owens-Illinois Inc.
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.