Granted Patent
Utility
US 5,000,767 · App. 07/530,924
Dust collector with pneumatic seal
Inventors:
Stephen Michael Sanders, Jr., Roger D. Williams
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: May 30, 1990
Inventors
Stephen Michael Sanders, Jr.
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.