Title:
IMPROVED NON-VOLATILE MEMORY SERIAL NUMBER LOCK FOR ELECTRONIC POSTAGE METER
Document Type and Number:
Japanese Patent JPS58172766
Kind Code:
A
Abstract:
An electronic postage meter (2) has a non-volatile memory (30) arranged to provide a field to accommodate a postage meter serial number. The serial number may be entered into the meter from a message generator (20) at the end of the manufacturing process after the meter has been assembled and the components tested. The postage meter (2) includes a routine programmed into a read only memory (28) which is intended to be used only once during the life of the meter's non-volatile memory (30). The routine requires the check of a non-volatile memory location which is set once the routine has been successfully completed. The setting of this bit prevents reentry into the one time program. The program can be reused until the bit is set. The bit is set by comparision of the data included in a received message with the value of the data contained in non-volatile memory. If the comparison is true, the bit is set.
Inventors:
EDOWAADO SHII DEYUUERU
JIYON ETSUCHI SOODAABAAGU
JIYON ETSUCHI SOODAABAAGU
Application Number:
JP3811383A
Publication Date:
October 11, 1983
Filing Date:
March 08, 1983
Export Citation:
Assignee:
PITNEY BOWES INC
International Classes:
G06Q50/00; G07B17/00; (IPC1-7): G06F15/20; G07B17/00
Attorney, Agent or Firm:
Kyozo Yuasa