FR992779A - metallic screen - Google Patents

metallic screen

Info

Publication number
FR992779A
FR992779A FR992779DA FR992779A FR 992779 A FR992779 A FR 992779A FR 992779D A FR992779D A FR 992779DA FR 992779 A FR992779 A FR 992779A
Authority
FR
France
Prior art keywords
metallic screen
metallic
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
Vittorio Bertoni
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 FR992779A publication Critical patent/FR992779A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR992779D 1948-08-12 1949-08-12 metallic screen Expired FR992779A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT992779X 1948-08-12

Publications (1)

Publication Number Publication Date
FR992779A true FR992779A (en) 1951-10-23

Family

ID=11333181

Family Applications (1)

Application Number Title Priority Date Filing Date
FR992779D Expired FR992779A (en) 1948-08-12 1949-08-12 metallic screen

Country Status (1)

Country Link
FR (1) FR992779A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155625A (en) * 1977-12-01 1979-05-22 Schudel Conard R Reflector construction
US4277136A (en) * 1977-12-01 1981-07-07 Schudel Conrad R Reflector construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155625A (en) * 1977-12-01 1979-05-22 Schudel Conard R Reflector construction
US4277136A (en) * 1977-12-01 1981-07-07 Schudel Conrad R Reflector construction

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