FR740917A - Projection screen frame - Google Patents

Projection screen frame

Info

Publication number
FR740917A
FR740917A FR740917DA FR740917A FR 740917 A FR740917 A FR 740917A FR 740917D A FR740917D A FR 740917DA FR 740917 A FR740917 A FR 740917A
Authority
FR
France
Prior art keywords
projection screen
screen frame
projection
frame
screen
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
Louis Halotel
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 FR740917A publication Critical patent/FR740917A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR740917D 1932-08-06 1932-08-06 Projection screen frame Expired FR740917A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR740917T 1932-08-06

Publications (1)

Publication Number Publication Date
FR740917A true FR740917A (en) 1933-02-03

Family

ID=9136496

Family Applications (1)

Application Number Title Priority Date Filing Date
FR740917D Expired FR740917A (en) 1932-08-06 1932-08-06 Projection screen frame

Country Status (1)

Country Link
FR (1) FR740917A (en)

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