FR711440A - Improvements to lighting devices - Google Patents

Improvements to lighting devices

Info

Publication number
FR711440A
FR711440A FR711440DA FR711440A FR 711440 A FR711440 A FR 711440A FR 711440D A FR711440D A FR 711440DA FR 711440 A FR711440 A FR 711440A
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.)
ELECTRO ENTPR
Original Assignee
ELECTRO ENTPR
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 ELECTRO ENTPR filed Critical ELECTRO ENTPR
Application granted granted Critical
Publication of FR711440A publication Critical patent/FR711440A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR711440D 1930-05-20 1930-05-20 Improvements to lighting devices Expired FR711440A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR711440T 1930-05-20

Publications (1)

Publication Number Publication Date
FR711440A true FR711440A (en) 1931-09-09

Family

ID=9075778

Family Applications (1)

Application Number Title Priority Date Filing Date
FR711440D Expired FR711440A (en) 1930-05-20 1930-05-20 Improvements to lighting devices

Country Status (1)

Country Link
FR (1) FR711440A (en)

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