CA432446A - Pupitre a conferences et projections - Google Patents

Pupitre a conferences et projections

Info

Publication number
CA432446A
CA432446A CA432446A CA432446DA CA432446A CA 432446 A CA432446 A CA 432446A CA 432446 A CA432446 A CA 432446A CA 432446D A CA432446D A CA 432446DA CA 432446 A CA432446 A CA 432446A
Authority
CA
Canada
Prior art keywords
lecture
projection desk
desk
projection
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
CA432446A
Other languages
English (en)
Inventor
Katz David
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCRIPTOSCOPE Co
Original Assignee
SCRIPTOSCOPE Co
Publication date
Application granted granted Critical
Publication of CA432446A publication Critical patent/CA432446A/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
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
CA432446A Pupitre a conferences et projections Expired CA432446A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA432446T

Publications (1)

Publication Number Publication Date
CA432446A true CA432446A (fr) 1946-01-08

Family

ID=210076

Family Applications (1)

Application Number Title Priority Date Filing Date
CA432446A Expired CA432446A (fr) Pupitre a conferences et projections

Country Status (1)

Country Link
CA (1) CA432446A (fr)

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