Granted Patent
Utility
US 5,156,443 · App. 07/756,053
Sealed roller assembly
Inventor:
Russell D. Ide
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Sep 6, 1991
Inventor
Russell D. Ide
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.