Granted Patent
Utility
US 5,165,140 · App. 07/656,238
Vacuum belt drive train
Inventor:
Russell D. Ide
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Feb 15, 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.