SE348564B - - Google Patents

Info

Publication number
SE348564B
SE348564B SE1289368A SE1289368A SE348564B SE 348564 B SE348564 B SE 348564B SE 1289368 A SE1289368 A SE 1289368A SE 1289368 A SE1289368 A SE 1289368A SE 348564 B SE348564 B SE 348564B
Authority
SE
Sweden
Application number
SE1289368A
Inventor
J Blomgren
G Brewitz
Original Assignee
Minnesota Mining & Mfg
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 Minnesota Mining & Mfg filed Critical Minnesota Mining & Mfg
Publication of SE348564B publication Critical patent/SE348564B/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)
  • Projection Apparatus (AREA)
SE1289368A 1967-10-04 1968-09-24 SE348564B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67284967A 1967-10-04 1967-10-04

Publications (1)

Publication Number Publication Date
SE348564B true SE348564B (en) 1972-09-04

Family

ID=24700274

Family Applications (1)

Application Number Title Priority Date Filing Date
SE1289368A SE348564B (en) 1967-10-04 1968-09-24

Country Status (3)

Country Link
FR (1) FR1586014A (en)
GB (1) GB1182901A (en)
SE (1) SE348564B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991000546A1 (en) * 1987-12-30 1991-01-10 Educatek Oy Overhead projector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991000546A1 (en) * 1987-12-30 1991-01-10 Educatek Oy Overhead projector
US5214459A (en) * 1987-12-30 1993-05-25 Educatek Oy Overhead projectors

Also Published As

Publication number Publication date
GB1182901A (en) 1970-03-04
FR1586014A (en) 1970-02-06

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