Granted Patent
Utility
US 5,053,063 · App. 07/473,750
Dust filtering and collection system
Inventor:
David E. Sisk
Patented Case
View Patent ↗
Granted: Oct 1, 1991
Filed: Feb 2, 1990
Inventor
David E. Sisk
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.