Granted Patent
Utility
US 4,878,926 · App. 07/232,808
Dust collector
Inventor:
Robert L. Goodrich
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Aug 16, 1988
Inventor
Robert L. Goodrich
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.