Granted Patent
Utility
US 4,186,830 · App. 05/882,732
Roller assembly for package flow systems
Inventors:
Robert L. Corey, Frederick E. Ullman
Patented Case
View Patent ↗
Granted: Feb 5, 1980
Filed: Mar 2, 1978
Inventors
Robert L. Corey
Frederick E. Ullman
Assignee (at issue)
Unarco Industries LLC
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.