FR2197475A7 - - Google Patents

Info

Publication number
FR2197475A7
FR2197475A7 FR7330129A FR7330129A FR2197475A7 FR 2197475 A7 FR2197475 A7 FR 2197475A7 FR 7330129 A FR7330129 A FR 7330129A FR 7330129 A FR7330129 A FR 7330129A FR 2197475 A7 FR2197475 A7 FR 2197475A7
Authority
FR
France
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
FR7330129A
Other languages
French (fr)
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 FR2197475A7 publication Critical patent/FR2197475A7/fr
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)
  • Projection Apparatus (AREA)
FR7330129A 1972-08-23 1973-08-20 Expired FR2197475A7 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19727231583 DE7231583U (en) 1972-08-23 1972-08-23 WRITING PROJECTOR

Publications (1)

Publication Number Publication Date
FR2197475A7 true FR2197475A7 (en) 1974-03-22

Family

ID=6632317

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7330129A Expired FR2197475A7 (en) 1972-08-23 1973-08-20

Country Status (2)

Country Link
DE (1) DE7231583U (en)
FR (1) FR2197475A7 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197691A1 (en) * 1985-04-01 1986-10-15 Minnesota Mining And Manufacturing Company Automatic focus for overhead projector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK24283A (en) * 1983-01-21 1984-07-22 Memofax As OVERHEAD PROJECTOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197691A1 (en) * 1985-04-01 1986-10-15 Minnesota Mining And Manufacturing Company Automatic focus for overhead projector

Also Published As

Publication number Publication date
DE7231583U (en) 1973-01-04

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Legal Events

Date Code Title Description
ST Notification of lapse