FR714233A - Porte-carte à champ de lecture variable - Google Patents

Porte-carte à champ de lecture variable

Info

Publication number
FR714233A
FR714233A FR714233DA FR714233A FR 714233 A FR714233 A FR 714233A FR 714233D A FR714233D A FR 714233DA FR 714233 A FR714233 A FR 714233A
Authority
FR
France
Prior art keywords
card holder
reading field
variable reading
variable
field
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
Other languages
English (en)
Inventor
Jacques Aivaz
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR714233A publication Critical patent/FR714233A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
    • G09B29/06—Maps; Plans; Charts; Diagrams, e.g. route diagram of belt form, e.g. endless belt

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
FR714233D 1930-06-30 1930-06-30 Porte-carte à champ de lecture variable Expired FR714233A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR714233T 1930-06-30

Publications (1)

Publication Number Publication Date
FR714233A true FR714233A (fr) 1931-11-10

Family

ID=9086413

Family Applications (1)

Application Number Title Priority Date Filing Date
FR714233D Expired FR714233A (fr) 1930-06-30 1930-06-30 Porte-carte à champ de lecture variable

Country Status (1)

Country Link
FR (1) FR714233A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800733A (en) * 1955-03-15 1957-07-30 Photogrammetry Inc Light box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800733A (en) * 1955-03-15 1957-07-30 Photogrammetry Inc Light box

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