United States Patent (1997): 6253311 http://1.usa.gov/o9tpqa http://1.usa.gov/o9tpqa United States Patent (1998): 6253312 http://1.usa.gov/p0BErf http://1.usa.

United States Patent (1997): 6253311 http://1.usa.gov/o9tpqa http://1.usa.gov/o9tpqa United States Patent (1998): 6253312 http://1.usa.gov/p0BErf http://1.usa.gov/p0BErf United States Patent (2002): 6754810 http://1.usa.gov/qI6MDt http://1.usa.gov/qI6MDt i just can't figure what it will be in 10 years for all the patents currently filed ...