Granted Patent
Utility
US 6,712,868 · App. 09/944,731
Bagless canister vacuum cleaner
Inventors:
John S. Murphy, Robert A. Matousek, Jeffrey M. Kalman, Craig M. Saunders, Richard C. Farone, David DiNunzio, Mark E. Cipolla, Paul D. Stephens, Michael F. Wright, Robert A. Salo
Patented Case
View Patent ↗
Granted: Mar 30, 2004
Filed: Aug 31, 2001
Inventors
John S. Murphy
Robert A. Matousek
Jeffrey M. Kalman
Craig M. Saunders
Richard C. Farone
David DiNunzio
Mark E. Cipolla
Paul D. Stephens
Michael F. Wright
Robert A. Salo
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.