Granted Patent
Utility
US 5,353,841 · App. 08/064,378
Pneumatic plug for clean-out tees
Inventors:
Allen D. Mathison, Marc P. Bevacco, Bryan Benson
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: May 21, 1993
Inventors
Allen D. Mathison
Marc P. Bevacco
Bryan Benson
Assignee (at issue)
Cherne Industries Incorporated
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.