GB1253237A - - Google Patents

Info

Publication number
GB1253237A
GB1253237A GB1253237DA GB1253237A GB 1253237 A GB1253237 A GB 1253237A GB 1253237D A GB1253237D A GB 1253237DA GB 1253237 A GB1253237 A GB 1253237A
Authority
GB
United Kingdom
Prior art keywords
shield
louvres
transparent
nov
matrix
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
Other languages
English (en)
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 filed Critical
Publication of GB1253237A publication Critical patent/GB1253237A/en
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)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)
  • Optical Elements Other Than Lenses (AREA)
GB1253237D 1967-11-14 1968-11-13 Expired GB1253237A (enrdf_load_stackoverflow)

Applications Claiming Priority (3)

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

Publications (1)

Publication Number Publication Date
GB1253237A true GB1253237A (enrdf_load_stackoverflow) 1971-11-10

Family

ID=27418406

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1253237D Expired GB1253237A (enrdf_load_stackoverflow) 1967-11-14 1968-11-13

Country Status (7)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2914682C3 (de) * 1979-04-11 1982-05-13 Schott Glaswerke, 6500 Mainz Verfahren zur Herstellung einer als Lichtblende wirkenden Glasplatte und nach diesem Verfahren hergestellte Glasplatte
DE2937433C2 (de) * 1979-09-15 1981-08-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Belichtungsanordnung
DE3127247A1 (de) * 1981-07-10 1983-01-20 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum herstellen eines jalousiefilters und vorrichtung zur durchfuehrung des verfahrens
DE3414848A1 (de) * 1983-04-26 1984-11-22 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Lichtdurchlaessiger verbundkoerper
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 (enrdf_load_stackoverflow) 1972-08-07
DE1808532B2 (de) 1972-01-27
NL164396B (nl) 1980-07-15
NL6815702A (enrdf_load_stackoverflow) 1969-05-19
CH494975A (de) 1970-08-15
JPS5126808B1 (enrdf_load_stackoverflow) 1976-08-09
DE1817823B2 (de) 1974-01-03
DE1808532A1 (de) 1969-08-07
DE1817823C3 (de) 1974-07-25
DE1817823A1 (de) 1972-03-09
FR1591751A (enrdf_load_stackoverflow) 1970-05-04

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee