2003-039708 is referenced by 34 patents.

PROBLEM TO BE SOLVED: To utilize resources effectively by utilizing a storage means attached to a cartridge effectively thereby promoting reuse of the cartridge. SOLUTION: The filling unit 66 comprises an access means 61 for reading out the quantity of used ink in a cartridge 10 requiring to be refilled from a storage means 15 attached to the cartridge 10, and a refill control means 60 for determining the quantity of ink based on the data thus read out. The cartridge 10 is refilled with a quantity of ink corresponding to ink consumption stored in the storage means 15 by means of the filling unit 66.

Filling unit of cartridge
Application Number
Publication Number
Application Date
May 29, 2001
Publication Date
February 13, 2003
Otsuki Koichi
Asauchi Noboru
Suda Koji
Koike Hisashi
Seiko Epson
G06F 17/60
B41J 02/01
B41J 02/175