FR508286A - Improvements in devices for projecting images - Google Patents

Improvements in devices for projecting images

Info

Publication number
FR508286A
FR508286A FR508286A FR508286DA FR508286A FR 508286 A FR508286 A FR 508286A FR 508286 A FR508286 A FR 508286A FR 508286D A FR508286D A FR 508286DA FR 508286 A FR508286 A FR 508286A
Authority
FR
France
Prior art keywords
devices
projecting images
projecting
images
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
FR508286A
Other languages
French (fr)
Inventor
Alfredo De Castro Silveira
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR508286A publication Critical patent/FR508286A/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
    • G03B21/10—Projectors with built-in or built-on screen

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR508286A 1920-01-10 1920-01-10 Improvements in devices for projecting images Expired FR508286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR508286T 1920-01-10

Publications (1)

Publication Number Publication Date
FR508286A true FR508286A (en) 1920-10-06

Family

ID=8910278

Family Applications (1)

Application Number Title Priority Date Filing Date
FR508286A Expired FR508286A (en) 1920-01-10 1920-01-10 Improvements in devices for projecting images

Country Status (1)

Country Link
FR (1) FR508286A (en)

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