Hirayama, Fukushi; Koshio, Hiroyuki; Ishihara, Tsukasa; Seki, Norio; Haehiya, Shunichiro; Sugasawa, Keizo; Shiraki, Ryota; Koga, Yuji; Matsumoto, Yuzo; shigenaga, Takeshi; Kawazoe, Souichirou
Patent: US2003/195193 A1, 2003 ;