FR580064A - Improvements to negatoscopes - Google Patents

Improvements to negatoscopes

Info

Publication number
FR580064A
FR580064A FR580064DA FR580064A FR 580064 A FR580064 A FR 580064A FR 580064D A FR580064D A FR 580064DA FR 580064 A FR580064 A FR 580064A
Authority
FR
France
Prior art keywords
negatoscopes
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
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.)
Drault & Ch Raulot Lapointe L
Original Assignee
Drault & Ch Raulot Lapointe L
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 Drault & Ch Raulot Lapointe L filed Critical Drault & Ch Raulot Lapointe L
Application granted granted Critical
Publication of FR580064A publication Critical patent/FR580064A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • G02B27/022—Viewing apparatus
    • G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR580064D 1924-04-11 1924-04-11 Improvements to negatoscopes Expired FR580064A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR580064T 1924-04-11

Publications (1)

Publication Number Publication Date
FR580064A true FR580064A (en) 1924-10-29

Family

ID=8956541

Family Applications (1)

Application Number Title Priority Date Filing Date
FR580064D Expired FR580064A (en) 1924-04-11 1924-04-11 Improvements to negatoscopes

Country Status (1)

Country Link
FR (1) FR580064A (en)

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