CA642801A - Data entry checking apparatus - Google Patents

Data entry checking apparatus

Info

Publication number
CA642801A
CA642801A CA642801A CA642801DA CA642801A CA 642801 A CA642801 A CA 642801A CA 642801 A CA642801 A CA 642801A CA 642801D A CA642801D A CA 642801DA CA 642801 A CA642801 A CA 642801A
Authority
CA
Canada
Prior art keywords
data entry
checking apparatus
entry checking
data
entry
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA642801A
Inventor
N. Porter Sigmund
M. Tink Robert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Cash Register Co
Original Assignee
National Cash Register Co
Publication date
Application granted granted Critical
Publication of CA642801A publication Critical patent/CA642801A/en
Expired legal-status Critical Current

Links

CA642801A Data entry checking apparatus Expired CA642801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA642801T

Publications (1)

Publication Number Publication Date
CA642801A true CA642801A (en) 1962-06-12

Family

ID=35921329

Family Applications (1)

Application Number Title Priority Date Filing Date
CA642801A Expired CA642801A (en) Data entry checking apparatus

Country Status (1)

Country Link
CA (1) CA642801A (en)

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