Granted Patent
Utility
US 6,192,548 · App. 09/522,681
Upright extraction cleaning machine with flow rate indicator
Inventor:
Eric C. Huffman
Patented Case
View Patent ↗
Granted: Feb 27, 2001
Filed: Mar 10, 2000
Inventor
Eric C. Huffman
Assignee (at issue)
BISSELL Homecare, 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.