FR587463A - Improvements to sighting or pointing devices - Google Patents

Improvements to sighting or pointing devices

Info

Publication number
FR587463A
FR587463A FR587463DA FR587463A FR 587463 A FR587463 A FR 587463A FR 587463D A FR587463D A FR 587463DA FR 587463 A FR587463 A FR 587463A
Authority
FR
France
Prior art keywords
sighting
pointing devices
pointing
devices
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)
Inventor
James Blacklock Henderson
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 filed Critical
Application granted granted Critical
Publication of FR587463A publication Critical patent/FR587463A/en
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
    • G02B23/14—Viewfinders

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR587463D 1915-05-10 1920-07-09 Improvements to sighting or pointing devices Expired FR587463A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB587463X 1915-05-10

Publications (1)

Publication Number Publication Date
FR587463A true FR587463A (en) 1925-04-18

Family

ID=10482326

Family Applications (1)

Application Number Title Priority Date Filing Date
FR587463D Expired FR587463A (en) 1915-05-10 1920-07-09 Improvements to sighting or pointing devices

Country Status (1)

Country Link
FR (1) FR587463A (en)

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