FR1475342A - Visual teaching device - Google Patents

Visual teaching device

Info

Publication number
FR1475342A
FR1475342A FR57049A FR57049A FR1475342A FR 1475342 A FR1475342 A FR 1475342A FR 57049 A FR57049 A FR 57049A FR 57049 A FR57049 A FR 57049A FR 1475342 A FR1475342 A FR 1475342A
Authority
FR
France
Prior art keywords
teaching device
visual teaching
visual
teaching
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
FR57049A
Other languages
French (fr)
Inventor
John S Wright
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
Priority to FR57049A priority Critical patent/FR1475342A/en
Application granted granted Critical
Publication of FR1475342A publication Critical patent/FR1475342A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR57049A 1966-04-08 1966-04-08 Visual teaching device Expired FR1475342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR57049A FR1475342A (en) 1966-04-08 1966-04-08 Visual teaching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR57049A FR1475342A (en) 1966-04-08 1966-04-08 Visual teaching device

Publications (1)

Publication Number Publication Date
FR1475342A true FR1475342A (en) 1967-03-31

Family

ID=8605902

Family Applications (1)

Application Number Title Priority Date Filing Date
FR57049A Expired FR1475342A (en) 1966-04-08 1966-04-08 Visual teaching device

Country Status (1)

Country Link
FR (1) FR1475342A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2642187A1 (en) * 1989-01-23 1990-07-27 Monnot Gerard Viewer briefcase for transparent documents

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2642187A1 (en) * 1989-01-23 1990-07-27 Monnot Gerard Viewer briefcase for transparent documents

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