FR77480E - projection screen - Google Patents

projection screen

Info

Publication number
FR77480E
FR77480E FR823253A FR823253A FR77480E FR 77480 E FR77480 E FR 77480E FR 823253 A FR823253 A FR 823253A FR 823253 A FR823253 A FR 823253A FR 77480 E FR77480 E FR 77480E
Authority
FR
France
Prior art keywords
projection screen
projection
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
FR823253A
Other languages
French (fr)
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.)
EMEL ETS
Original Assignee
EMEL ETS
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 by EMEL ETS filed Critical EMEL ETS
Priority to FR823253A priority Critical patent/FR77480E/en
Application granted granted Critical
Publication of FR77480E publication Critical patent/FR77480E/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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • 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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR823253A 1960-04-02 1960-04-02 projection screen Expired FR77480E (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR823253A FR77480E (en) 1960-04-02 1960-04-02 projection screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR823253A FR77480E (en) 1960-04-02 1960-04-02 projection screen

Publications (1)

Publication Number Publication Date
FR77480E true FR77480E (en) 1962-03-09

Family

ID=8728526

Family Applications (1)

Application Number Title Priority Date Filing Date
FR823253A Expired FR77480E (en) 1960-04-02 1960-04-02 projection screen

Country Status (1)

Country Link
FR (1) FR77480E (en)

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