A Hattori, M Miura, M Takahashi, N Uchida… - US Patent …, 1997 - Google Patents
This is a division of application Ser. No. 08/410,981, 5 filed Mar. 27, 1995, which is a division
of application Ser. No. 08/363,580 filed Dec. 22, 1994, which is a continuation of application …