BE814852A - DAY-TO-DAY PROJECTION DEVICE - Google Patents

DAY-TO-DAY PROJECTION DEVICE

Info

Publication number
BE814852A
BE814852A BE144173A BE144173A BE814852A BE 814852 A BE814852 A BE 814852A BE 144173 A BE144173 A BE 144173A BE 144173 A BE144173 A BE 144173A BE 814852 A BE814852 A BE 814852A
Authority
BE
Belgium
Prior art keywords
day
projection device
projection
day projection
Prior art date
Application number
BE144173A
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
Publication of BE814852A publication Critical patent/BE814852A/en

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
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)
BE144173A 1973-06-27 1974-05-10 DAY-TO-DAY PROJECTION DEVICE BE814852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732333770 DE2333770A1 (en) 1973-06-27 1973-06-27 DAYLIGHT PROJECTOR

Publications (1)

Publication Number Publication Date
BE814852A true BE814852A (en) 1974-11-18

Family

ID=5885804

Family Applications (1)

Application Number Title Priority Date Filing Date
BE144173A BE814852A (en) 1973-06-27 1974-05-10 DAY-TO-DAY PROJECTION DEVICE

Country Status (6)

Country Link
BE (1) BE814852A (en)
CH (1) CH566568A5 (en)
DE (1) DE2333770A1 (en)
DK (1) DK337674A (en)
FR (1) FR2235628A5 (en)
GB (1) GB1429283A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3410002A1 (en) * 1984-03-19 1985-09-19 Demolux Gmbh & Co Kg, 6070 Langen Overhead projector
US6497489B1 (en) * 2001-08-29 2002-12-24 Benq Corporation Projector with guiding rib in vent

Also Published As

Publication number Publication date
DK337674A (en) 1975-02-10
GB1429283A (en) 1976-03-24
CH566568A5 (en) 1975-09-15
FR2235628A5 (en) 1975-01-24
DE2333770A1 (en) 1975-01-23

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