Granted Patent
Utility
US 4,246,014 · App. 06/041,131
Bag filter thimble
Inventors:
David W. Wright, Harley G. Peterson
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: May 21, 1979
Inventors
David W. Wright
Harley G. Peterson
Assignee (at issue)
Joy Manufacturing Company
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.