公开(公告)号：EP4261621A1

公开(公告)日：2023-10-18

申请号：EP23185215.3

申请日：2019-04-11

申请人： Lexmark International, Inc.

发明人： FOLEY, Nathan Wayne ,  WILLIAMS, Jennifer Topmiller ,  WOODS, Gregory Scott ,  MOORE, Jimmy Daniel

IPC分类号： G03G15/08 ,  G03G21/18

摘要： A toner container installable in an image forming device having a controller according to one example embodiment includes a housing having a reservoir for storing toner. A chip is positioned on the housing and configured to receive a first write command from the controller of the image forming device. The chip is further configured to determine whether a transmission cycle bit of the first write command matches a transmission cycle bit of a second write command received by the chip from the controller of the image forming device previous to the first write command. The chip is further configured to resend to the controller of the image forming device a response to the second write command if the transmission cycle bit of the first write command matches the transmission cycle bit of the second write command.

公开(公告)号：EP4362024A3

公开(公告)日：2024-07-31

申请号：EP24164272.7

申请日：2019-04-16

申请人： Lexmark International, Inc.

发明人： BUSH, Stephen Porter ,  WILLIAMS, Jennifer Topmiller

IPC分类号： G01R31/317 ,  G06F12/14 ,  G06F9/22 ,  G06F21/44 ,  G06F21/60 ,  G06F21/78 ,  G06F21/62 ,  G06F21/71 ,  G11C7/24 ,  G11C29/48 ,  G11C29/54 ,  G11C29/56 ,  G11C29/04 ,  G11C29/44

CPC分类号： G06F21/71 ,  G06F21/6209 ,  G11C29/56016 ,  G11C2029/040320130101 ,  G11C7/24 ,  G11C2029/440220130101 ,  G11C29/48 ,  G11C29/54 ,  G01R31/31719 ,  G06F12/1408 ,  G06F12/1458 ,  G06F2212/105220130101 ,  G06F21/608 ,  G06F21/44 ,  G06F2221/214320130101 ,  G06F2221/03320130101 ,  G06F21/78

摘要： An example method for restricting read access to content in the component circuitry and securing data in the supply item is disclosed. The method identifies the status of a read command, and depending upon whether the status disabled or enabled, either blocks the accessing of encrypted data stored in the supply chip, or allows the accessing of the encrypted data stored in the supply chip.

公开(公告)号：EP4362024A2

公开(公告)日：2024-05-01

申请号：EP24164272.7

申请日：2019-04-16

申请人： Lexmark International, Inc.

发明人： BUSH, Stephen Porter ,  WILLIAMS, Jennifer Topmiller

IPC分类号： G11C29/44

CPC分类号： G06F21/71 ,  G06F21/6209 ,  G11C29/56016 ,  G11C2029/040320130101 ,  G11C7/24 ,  G11C2029/440220130101 ,  G11C29/48 ,  G11C29/54 ,  G01R31/31719 ,  G06F12/1408 ,  G06F12/1458 ,  G06F2212/105220130101 ,  G06F21/608 ,  G06F21/44 ,  G06F2221/214320130101 ,  G06F2221/03320130101 ,  G06F21/78

摘要： An example method for restricting read access to content in the component circuitry and securing data in the supply item is disclosed. The method identifies the status of a read command, and depending upon whether the status disabled or enabled, either blocks the accessing of encrypted data stored in the supply chip, or allows the accessing of the encrypted data stored in the supply chip.