Electrical computers and digital processing systems: support – Computer power control – Having power source monitoring
Reexamination Certificate
2007-05-16
2010-06-29
Du, Thuan N (Department: 2116)
Electrical computers and digital processing systems: support
Computer power control
Having power source monitoring
C713S300000, C711S163000, C714S022000, C358S001140
Reexamination Certificate
active
07747887
ABSTRACT:
A print engine comprising at least one print controller and at least one associated authentication device is provided. Each authentication device has a processor, non-volatile memory, an input for receiving power from a power supply and a power detection unit. Each authentication device is configured to enable multi-word writes to the non-volatile memory under control of the associated print controller. The processor is configured to control and trim the amount of power supplied to the input to predetermine a threshold at which operation of the authentication device is established. The power detection unit is configured to monitor a voltage level of the power supplied to the input, and in the event the voltage level drops below the predetermined threshold, preventing subsequent words in any multi-word write currently being performed from being written to the memory.
REFERENCES:
patent: 4247913 (1981-01-01), Hiniker et al.
patent: 4451742 (1984-05-01), Aswell
patent: 4461003 (1984-07-01), Tamaki
patent: 4644494 (1987-02-01), Muller
patent: 4692903 (1987-09-01), Borg et al.
patent: 4999575 (1991-03-01), Germer
patent: 5212664 (1993-05-01), Shinohara
patent: 5233557 (1993-08-01), Sakagami et al.
patent: 5420798 (1995-05-01), Lin et al.
patent: 5619456 (1997-04-01), McClure
patent: 5655076 (1997-08-01), Kimura et al.
patent: 5745912 (1998-04-01), Konishi et al.
patent: 5896263 (1999-04-01), Terdan et al.
patent: 5973968 (1999-10-01), Schu et al.
patent: 6226098 (2001-05-01), Kulakowski et al.
patent: 6263453 (2001-07-01), Anderson
patent: 6354689 (2002-03-01), Couwenhoven et al.
patent: 6559629 (2003-05-01), Fernald
patent: 2002/0060707 (2002-05-01), Yu et al.
patent: 2004/0236961 (2004-11-01), Walmsley
patent: 0863004 (1998-09-01), None
patent: 0963854 (1999-12-01), None
patent: 0974467 (2000-01-01), None
patent: 0983855 (2000-03-01), None
patent: 1157840 (2001-11-01), None
patent: WO 98/40222 (1998-09-01), None
patent: WO 99/08875 (1999-02-01), None
patent: WO 00/64679 (2000-11-01), None
Shipton Gary
Walmsley Simon Robert
Du Thuan N
Silverbrook Research Pty Ltd
LandOfFree
Print engine having authentication device for preventing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Print engine having authentication device for preventing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Print engine having authentication device for preventing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4244074