Image Source for Antecedents

Dr. Tom. carpet-beater. http://drtomsvac.com/history.php (accessed March 2, 2011).

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Ontask. Flickr. May 21, 2010. http://www.flickr.com/photos/ontask/4628257330/ (accessed March 2, 2011).

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Kautzman, Robert. Patent for the Carpet sweeper. http://www.vachunter.com/galleries.htm (accessed February 4, 2011).

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Bissell. Bissell history. 2004-2011. http://www.bissell.com/Page_id/88/History.aspx (accessed March 2, 2011).

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