CH561434A5 - - Google Patents

Info

Publication number
CH561434A5
CH561434A5 CH579474A CH579474A CH561434A5 CH 561434 A5 CH561434 A5 CH 561434A5 CH 579474 A CH579474 A CH 579474A CH 579474 A CH579474 A CH 579474A CH 561434 A5 CH561434 A5 CH 561434A5
Authority
CH
Switzerland
Application number
CH579474A
Original Assignee
Ritzerfeld Gerhard
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 Ritzerfeld Gerhard filed Critical Ritzerfeld Gerhard
Publication of CH561434A5 publication Critical patent/CH561434A5/xx

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)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
CH579474A 1973-06-23 1974-04-26 CH561434A5 (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2332662A DE2332662A1 (de) 1973-06-23 1973-06-23 Tageslicht-projektionsgeraet

Publications (1)

Publication Number Publication Date
CH561434A5 true CH561434A5 (xx) 1975-04-30

Family

ID=5885227

Family Applications (1)

Application Number Title Priority Date Filing Date
CH579474A CH561434A5 (xx) 1973-06-23 1974-04-26

Country Status (7)

Country Link
BE (1) BE814263A (xx)
CH (1) CH561434A5 (xx)
DE (1) DE2332662A1 (xx)
DK (1) DK333574A (xx)
FR (1) FR2234827A5 (xx)
GB (1) GB1424298A (xx)
NO (1) NO741870L (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9311880U1 (de) * 1993-08-04 1993-10-14 AV-Kommunikation Anders + Kern GmbH & Co KG, 22851 Norderstedt Overhead-Projektor mit einem Variofocalobjektiv
DE19538795C2 (de) * 1995-10-18 1997-11-27 Peter Ochsenmeier Durchlicht-Overheadprojektor

Also Published As

Publication number Publication date
GB1424298A (en) 1976-02-11
DK333574A (xx) 1975-02-10
NO741870L (xx) 1975-01-20
BE814263A (fr) 1974-08-16
DE2332662A1 (de) 1975-03-20
FR2234827A5 (xx) 1975-01-17

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Legal Events

Date Code Title Description
PL Patent ceased