CH514151A - Writing projector - Google Patents

Writing projector

Info

Publication number
CH514151A
CH514151A CH246871A CH246871A CH514151A CH 514151 A CH514151 A CH 514151A CH 246871 A CH246871 A CH 246871A CH 246871 A CH246871 A CH 246871A CH 514151 A CH514151 A CH 514151A
Authority
CH
Switzerland
Prior art keywords
writing projector
projector
writing
Prior art date
Application number
CH246871A
Other languages
German (de)
Inventor
Ritzerfeld Gerhard
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 CH514151A publication Critical patent/CH514151A/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)
  • Projection Apparatus (AREA)
CH246871A 1970-04-09 1971-02-19 Writing projector CH514151A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19707013655 DE7013655U (en) 1970-04-09 1970-04-09 WRITING PROJECTOR.

Publications (1)

Publication Number Publication Date
CH514151A true CH514151A (en) 1971-10-15

Family

ID=6610883

Family Applications (1)

Application Number Title Priority Date Filing Date
CH246871A CH514151A (en) 1970-04-09 1971-02-19 Writing projector

Country Status (3)

Country Link
CH (1) CH514151A (en)
DE (1) DE7013655U (en)
FR (1) FR2083230A5 (en)

Also Published As

Publication number Publication date
DE7013655U (en) 1970-08-27
FR2083230A5 (en) 1971-12-10

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