FR662579A - Improvements to electrical exhibition devices - Google Patents

Improvements to electrical exhibition devices

Info

Publication number
FR662579A
FR662579A FR662579DA FR662579A FR 662579 A FR662579 A FR 662579A FR 662579D A FR662579D A FR 662579DA FR 662579 A FR662579 A FR 662579A
Authority
FR
France
Prior art keywords
exhibition devices
electrical
electrical exhibition
devices
exhibition
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
French (fr)
Inventor
Paul Henry Waller
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 FR662579A publication Critical patent/FR662579A/en
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
    • G09B29/10—Map spot or coordinate position indicators; Map reading aids
    • G09B29/102—Map spot or coordinate position indicators; Map reading aids using electrical means

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)
FR662579D 1927-10-26 1928-10-19 Improvements to electrical exhibition devices Expired FR662579A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB662579X 1927-10-26

Publications (1)

Publication Number Publication Date
FR662579A true FR662579A (en) 1929-08-08

Family

ID=10491045

Family Applications (1)

Application Number Title Priority Date Filing Date
FR662579D Expired FR662579A (en) 1927-10-26 1928-10-19 Improvements to electrical exhibition devices

Country Status (1)

Country Link
FR (1) FR662579A (en)

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