CA1125066A - Extension platform to support transparencies for an overhead projector - Google Patents

Extension platform to support transparencies for an overhead projector

Info

Publication number
CA1125066A
CA1125066A CA355,818A CA355818A CA1125066A CA 1125066 A CA1125066 A CA 1125066A CA 355818 A CA355818 A CA 355818A CA 1125066 A CA1125066 A CA 1125066A
Authority
CA
Canada
Prior art keywords
transparencies
body member
pack
extension platform
book
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
CA355,818A
Other languages
English (en)
French (fr)
Inventor
John S. Wright
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA1125066A publication Critical patent/CA1125066A/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)
  • Coin-Freed Apparatuses For Hiring Articles (AREA)
CA355,818A 1979-09-11 1980-07-09 Extension platform to support transparencies for an overhead projector Expired CA1125066A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7449079A 1979-09-11 1979-09-11
US74,490 1979-09-11

Publications (1)

Publication Number Publication Date
CA1125066A true CA1125066A (en) 1982-06-08

Family

ID=22119833

Family Applications (1)

Application Number Title Priority Date Filing Date
CA355,818A Expired CA1125066A (en) 1979-09-11 1980-07-09 Extension platform to support transparencies for an overhead projector

Country Status (8)

Country Link
CA (1) CA1125066A (OSRAM)
CH (1) CH647340A5 (OSRAM)
DE (1) DE3025927A1 (OSRAM)
DK (1) DK379080A (OSRAM)
FR (1) FR2465247A1 (OSRAM)
GB (1) GB2060193B (OSRAM)
NL (1) NL8005104A (OSRAM)
SE (1) SE445394B (OSRAM)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE439999B (sv) * 1984-07-23 1985-07-08 Nord Ab Ingfirma Forfarande for presentation av information pa ett flertal arkformiga informationsberare samt anordning for genomforande av forfarandet
USD307030S (en) 1987-04-10 1990-04-03 Buhl Industries Light box assembly for an overhead projector
DE4241860A1 (de) * 1992-12-11 1994-06-16 Geha Werke Gmbh Wechseleinrichtung für die Projektion von Overhead-Folien und Klarsicht-Folientasche
WO1994024605A1 (en) * 1993-04-16 1994-10-27 Nichod Inc. Transparency organizer and storage tray
USD373779S (en) 1994-10-31 1996-09-17 Plus Corporation Combined overhead projector and automatic film feeding unit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253358A (en) * 1963-07-17 1966-05-31 John S Wright Visual teaching system
US3640613A (en) * 1967-03-24 1972-02-08 Scott Paper Co Transparency display apparatus
US3524703A (en) * 1968-07-29 1970-08-18 John S Wright Transparency storage and display device for an overhead projector
NL6918742A (OSRAM) * 1969-12-13 1971-06-15
US3709590A (en) * 1970-09-14 1973-01-09 A Bisberg Folder for overhead projector

Also Published As

Publication number Publication date
NL8005104A (nl) 1981-03-13
GB2060193A (en) 1981-04-29
CH647340A5 (de) 1985-01-15
DE3025927A1 (de) 1981-03-26
SE8005825L (sv) 1981-03-12
GB2060193B (en) 1983-08-24
FR2465247A1 (fr) 1981-03-20
DK379080A (da) 1981-03-12
SE445394B (sv) 1986-06-16
FR2465247B1 (OSRAM) 1983-12-16

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Legal Events

Date Code Title Description
MKEX Expiry