IIIH
US006944394B2
(12) United States Patent (io) Patent No.: US 6,944,394 B2
Long et al. (45) Date of Patent: Sep. 13,2005
(21) Appl. No.: 10/053,968
(22) Filed: Jan. 22, 2002
(65) Prior Publication Data
US 2003/0138244 Al Jul. 24, 2003
(51) Int. CI. 12411 1 10
(52) U.S. CI 392/485; 392/465; 392/480
(58) Field of Search 392/465, 466,
392/485, 480, 491, 492
(56) References Cited
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