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CA520626A - Keyboard operated mechanical machines for perforating cards - Google Patents

Keyboard operated mechanical machines for perforating cards

Info

Publication number
CA520626A
CA520626A CA520626A CA520626DA CA520626A CA 520626 A CA520626 A CA 520626A CA 520626 A CA520626 A CA 520626A CA 520626D A CA520626D A CA 520626DA CA 520626 A CA520626 A CA 520626A
Authority
CA
Canada
Prior art keywords
operated mechanical
mechanical machines
keyboard operated
perforating
cards
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
CA520626A
Other languages
French (fr)
Inventor
E. Boxall Donald
E. Johnson William
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.)
Powers Samas Accounting Machines Ltd
Original Assignee
Powers Samas Accounting Machines Ltd
Publication date
Application granted granted Critical
Publication of CA520626A publication Critical patent/CA520626A/en
Expired legal-status Critical Current

Links

CA520626A Keyboard operated mechanical machines for perforating cards Expired CA520626A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA520626T

Publications (1)

Publication Number Publication Date
CA520626A true CA520626A (en) 1956-01-10

Family

ID=35673845

Family Applications (1)

Application Number Title Priority Date Filing Date
CA520626A Expired CA520626A (en) Keyboard operated mechanical machines for perforating cards

Country Status (1)

Country Link
CA (1) CA520626A (en)

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