CA679522A - Aperture card system - Google Patents

Aperture card system

Info

Publication number
CA679522A
CA679522A CA679522A CA679522DA CA679522A CA 679522 A CA679522 A CA 679522A CA 679522 A CA679522 A CA 679522A CA 679522D A CA679522D A CA 679522DA CA 679522 A CA679522 A CA 679522A
Authority
CA
Canada
Prior art keywords
card system
aperture card
aperture
card
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
CA679522A
Inventor
F. Langan John
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.)
Langan Aperture Cards Inc
Original Assignee
Langan Aperture Cards Inc
Publication date
Application granted granted Critical
Publication of CA679522A publication Critical patent/CA679522A/en
Expired legal-status Critical Current

Links

CA679522A Aperture card system Expired CA679522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA679522T

Publications (1)

Publication Number Publication Date
CA679522A true CA679522A (en) 1964-02-04

Family

ID=35980605

Family Applications (1)

Application Number Title Priority Date Filing Date
CA679522A Expired CA679522A (en) Aperture card system

Country Status (1)

Country Link
CA (1) CA679522A (en)

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