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CH494975A - Stand projector - Google Patents

Stand projector

Info

Publication number
CH494975A
CH494975A CH1696068A CH1696068A CH494975A CH 494975 A CH494975 A CH 494975A CH 1696068 A CH1696068 A CH 1696068A CH 1696068 A CH1696068 A CH 1696068A CH 494975 A CH494975 A CH 494975A
Authority
CH
Switzerland
Prior art keywords
projector
stand
stand projector
Prior art date
Application number
CH1696068A
Other languages
German (de)
Inventor
V Erwin James
H Appeldorn Roger
W Willmore Naaman
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 CH494975A publication Critical patent/CH494975A/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)
CH1696068A 1967-11-14 1968-11-13 Stand projector CH494975A (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 (1)

Publication Number Publication Date
CH494975A true CH494975A (en) 1970-08-15

Family

ID=27418406

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1696068A CH494975A (en) 1967-11-14 1968-11-13 Stand projector

Country Status (7)

Country Link
JP (1) JPS5126808B1 (en)
CH (1) CH494975A (en)
DE (2) DE1808532B2 (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
SE347581B (en) 1972-08-07
GB1253237A (en) 1971-11-10
DE1817823A1 (en) 1972-03-09
DE1808532A1 (en) 1969-08-07
DE1817823B2 (en) 1974-01-03
FR1591751A (en) 1970-05-04
DE1808532B2 (en) 1972-01-27
JPS5126808B1 (en) 1976-08-09
NL6815702A (en) 1969-05-19
NL164396B (en) 1980-07-15
DE1817823C3 (en) 1974-07-25

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Legal Events

Date Code Title Description
PL Patent ceased