NL164396B - OVERHEAD PROJECTOR WITH ANTI-BLINDING SCREEN. - Google Patents

OVERHEAD PROJECTOR WITH ANTI-BLINDING SCREEN.

Info

Publication number
NL164396B
NL164396B NL6815702A NL6815702A NL164396B NL 164396 B NL164396 B NL 164396B NL 6815702 A NL6815702 A NL 6815702A NL 6815702 A NL6815702 A NL 6815702A NL 164396 B NL164396 B NL 164396B
Authority
NL
Netherlands
Prior art keywords
overhead projector
blinding
screen
blinding screen
projector
Prior art date
Application number
NL6815702A
Other languages
Dutch (nl)
Other versions
NL6815702A (en
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 NL6815702A publication Critical patent/NL6815702A/xx
Publication of NL164396B publication Critical patent/NL164396B/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)
  • Optical Elements Other Than Lenses (AREA)
NL6815702A 1967-11-14 1968-11-04 OVERHEAD PROJECTOR WITH ANTI-BLINDING SCREEN. NL164396B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US68295167A 1967-11-14 1967-11-14
US71226368A 1968-03-11 1968-03-11
US71226268A 1968-03-11 1968-03-11

Publications (2)

Publication Number Publication Date
NL6815702A NL6815702A (en) 1969-05-19
NL164396B true NL164396B (en) 1980-07-15

Family

ID=27418406

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6815702A NL164396B (en) 1967-11-14 1968-11-04 OVERHEAD PROJECTOR WITH ANTI-BLINDING SCREEN.

Country Status (7)

Country Link
JP (1) JPS5126808B1 (en)
CH (1) CH494975A (en)
DE (2) DE1817823C3 (en)
FR (1) FR1591751A (en)
GB (1) GB1253237A (en)
NL (1) NL164396B (en)
SE (1) SE347581B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2914682C3 (en) * 1979-04-11 1982-05-13 Schott Glaswerke, 6500 Mainz Process for the production of a glass plate acting as a light screen and a glass plate produced according to this process
DE2937433C2 (en) * 1979-09-15 1981-08-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Exposure arrangement
DE3127247A1 (en) * 1981-07-10 1983-01-20 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Process for producing a louvre filter and device for carrying out the process
DE3414848A1 (en) * 1983-04-26 1984-11-22 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Light-transmitting composite body
WO2021198888A1 (en) 2020-03-31 2021-10-07 Pi Industries Ltd. An improved enzyme catalyzed carboxylation reaction

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255665A (en) * 1964-05-21 1966-06-14 Minnesota Mining & Mfg Article of manufacture for controlling light transmittance
US3340765A (en) * 1964-07-27 1967-09-12 Bell Telephone Labor Inc Projection system

Also Published As

Publication number Publication date
DE1817823C3 (en) 1974-07-25
DE1817823B2 (en) 1974-01-03
CH494975A (en) 1970-08-15
SE347581B (en) 1972-08-07
JPS5126808B1 (en) 1976-08-09
GB1253237A (en) 1971-11-10
DE1808532A1 (en) 1969-08-07
NL6815702A (en) 1969-05-19
FR1591751A (en) 1970-05-04
DE1817823A1 (en) 1972-03-09
DE1808532B2 (en) 1972-01-27

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Legal Events

Date Code Title Description
V1 Lapsed because of non-payment of the annual fee