FR1572828A - - Google Patents

Info

Publication number
FR1572828A
FR1572828A FR1572828DA FR1572828A FR 1572828 A FR1572828 A FR 1572828A FR 1572828D A FR1572828D A FR 1572828DA FR 1572828 A FR1572828 A FR 1572828A
Authority
FR
France
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)
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 FR1572828A publication Critical patent/FR1572828A/fr
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
    • G03B21/60—Projection screens characterised by the nature of the surface

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
FR1572828D 1967-07-13 1968-07-08 Expired FR1572828A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65306567A 1967-07-13 1967-07-13

Publications (1)

Publication Number Publication Date
FR1572828A true FR1572828A (enrdf_load_stackoverflow) 1969-06-27

Family

ID=24619354

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1572828D Expired FR1572828A (enrdf_load_stackoverflow) 1967-07-13 1968-07-08

Country Status (2)

Country Link
DE (1) DE1772845A1 (enrdf_load_stackoverflow)
FR (1) FR1572828A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994017445A1 (en) * 1993-01-28 1994-08-04 Hughes Training, Inc. A method of backscreen fabrication using pre-coated material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994017445A1 (en) * 1993-01-28 1994-08-04 Hughes Training, Inc. A method of backscreen fabrication using pre-coated material
US5525272A (en) * 1993-01-28 1996-06-11 Hughes Traninig Inc. Method of backscreen fabrication using pre-coated material

Also Published As

Publication number Publication date
DE1772845A1 (de) 1970-09-17

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Legal Events

Date Code Title Description
ST Notification of lapse