Navigation bar: Search Patents > Utility Patent 868,575 > Drawings: Page 1/7 Page 2/7 Page 3/7 Page 4/7 Page 5/7 Page 6/7 Page 7/7 Text:  6 pages Page 1/6 Page 2/6 Page 3/6 Page 4/6 Page 5/6 Page 6/6