Granted Patent
Utility
US 6,721,990 · App. 10/261,020
Carpet extractor with dual nozzles for dual brushrolls
Inventors:
Terry L. Zahuranec, Brett Latimer, Robert A. Salo, Mark E. Cipolla, Wallace D. Tiller, Jr., Jeffrey M. Kalman, Craig M. Saunders
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Sep 30, 2002
Inventors
Terry L. Zahuranec
Brett Latimer
Robert A. Salo
Mark E. Cipolla
Wallace D. Tiller, Jr.
Jeffrey M. Kalman
Craig M. Saunders
Assignee (at issue)
Royal Appliance Mfg., Co.
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.