FR565628A - - Google Patents

Info

Publication number
FR565628A
FR565628A FR565628DA FR565628A FR 565628 A FR565628 A FR 565628A FR 565628D A FR565628D A FR 565628DA FR 565628 A FR565628 A FR 565628A
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
Other languages
French (fr)
Publication date
Application granted granted Critical
Publication of FR565628A publication Critical patent/FR565628A/fr
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
    • G02B27/40—Optical focusing aids

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR565628D Expired FR565628A (enrdf_load_html_response)

Publications (1)

Publication Number Publication Date
FR565628A true FR565628A (enrdf_load_html_response) 1924-01-31

Family

ID=1539025

Family Applications (1)

Application Number Title Priority Date Filing Date
FR565628D Expired FR565628A (enrdf_load_html_response)

Country Status (1)

Country Link
FR (1) FR565628A (enrdf_load_html_response)

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