6Steven J.Dietl,David P.Breemes,Palmyra.Medium for ink delivery systems:US,5491501[P] ,1996-02-13.
7Jun Kawai,Yohei Sato,Yoichi Taneya.Ink tank,ink tank-integrated head cartridge having the tank and ink head comtructed integrally,and ink jet printing apparatus having the ink tank or head cartridge:US,5652610[P].1997-07-29.
8Kazuyuki Oda,Yoshihiko Fujimura,Jun Isozaki.Ink tank,inkjet cartridge and ink-jet recording apparatus:US,5552816[P].1996-09-03.