FR1005518A - - Google Patents

Info

Publication number
FR1005518A
FR1005518A FR1005518DA FR1005518A FR 1005518 A FR1005518 A FR 1005518A FR 1005518D A FR1005518D A FR 1005518DA FR 1005518 A FR1005518 A FR 1005518A
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 FR1005518A publication Critical patent/FR1005518A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
    • G02B23/08—Periscopes

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR1005518D Expired FR1005518A (zh)

Publications (1)

Publication Number Publication Date
FR1005518A true FR1005518A (zh) 1952-04-17

Family

ID=1567408

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1005518D Expired FR1005518A (zh)

Country Status (1)

Country Link
FR (1) FR1005518A (zh)

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