Granted Patent
Utility
US 4,454,704 · App. 06/322,443
Heat control system for packaging machine
Inventor:
John E. Ullman
Patented Case
View Patent ↗
Granted: Jun 19, 1984
Filed: Nov 18, 1981
Inventor
John E. Ullman
Assignee (at issue)
The Mead Corporation
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.