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FR864793A - Improvements to lighting devices - Google Patents

Improvements to lighting devices

Info

Publication number
FR864793A
FR864793A FR864793DA FR864793A FR 864793 A FR864793 A FR 864793A FR 864793D A FR864793D A FR 864793DA FR 864793 A FR864793 A FR 864793A
Authority
FR
France
Prior art keywords
lighting devices
lighting
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)
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.)
LUMINOGRAPH
Original Assignee
LUMINOGRAPH
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 LUMINOGRAPH filed Critical LUMINOGRAPH
Application granted granted Critical
Publication of FR864793A publication Critical patent/FR864793A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/34—Illuminated signs; Luminous advertising with light sources co-operating with movable members, e.g. with shutters to cover or uncover the light source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Marketing (AREA)
FR864793D 1939-12-20 1939-12-20 Improvements to lighting devices Expired FR864793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR864793T 1939-12-20

Publications (1)

Publication Number Publication Date
FR864793A true FR864793A (en) 1941-05-05

Family

ID=9344029

Family Applications (1)

Application Number Title Priority Date Filing Date
FR864793D Expired FR864793A (en) 1939-12-20 1939-12-20 Improvements to lighting devices

Country Status (1)

Country Link
FR (1) FR864793A (en)

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