Granted Patent
Utility
US 4,948,639 · App. 07/435,301
Vacuum cleaner bag
Inventors:
Ronald W. Brooker, Bernard Cohen
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Nov 13, 1989
Inventors
Ronald W. Brooker
Bernard Cohen
Assignee (at issue)
Kimberly-Clark Inc.
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.