Granted Patent
Utility
US 4,407,648 · App. 06/366,870
Counter rotating packerhead assembly
Inventor:
Navarro T. Fosse
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Apr 9, 1982
Inventor
Navarro T. Fosse
Assignee (at issue)
Hydrotile Machinery Company
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.