Granted Patent
Utility
US 5,116,395 · App. 07/727,648
Dust collection with programmable cleaning air control
Inventor:
Roger D. Williams
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: Jul 9, 1991
Inventor
Roger D. Williams
Assignee (at issue)
Pneumafil Corporation
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.