FR430823A - Improvements in projection devices - Google Patents

Improvements in projection devices

Info

Publication number
FR430823A
FR430823A FR430823DA FR430823A FR 430823 A FR430823 A FR 430823A FR 430823D A FR430823D A FR 430823DA FR 430823 A FR430823 A FR 430823A
Authority
FR
France
Prior art keywords
projection devices
projection
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
Gaston-Victor-Justin Guilbert
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.)
GASTON-VICTOR-JUSTIN GUILBERT
Original Assignee
GASTON-VICTOR-JUSTIN GUILBERT
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 GASTON-VICTOR-JUSTIN GUILBERT filed Critical GASTON-VICTOR-JUSTIN GUILBERT
Application granted granted Critical
Publication of FR430823A publication Critical patent/FR430823A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR430823D 1910-08-23 1910-08-23 Improvements in projection devices Expired FR430823A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR430823T 1910-08-23

Publications (1)

Publication Number Publication Date
FR430823A true FR430823A (en) 1911-10-25

Family

ID=1473032

Family Applications (1)

Application Number Title Priority Date Filing Date
FR430823D Expired FR430823A (en) 1910-08-23 1910-08-23 Improvements in projection devices

Country Status (1)

Country Link
FR (1) FR430823A (en)

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