FR675455A - Improvements to exposure devices - Google Patents

Improvements to exposure devices

Info

Publication number
FR675455A
FR675455A FR675455DA FR675455A FR 675455 A FR675455 A FR 675455A FR 675455D A FR675455D A FR 675455DA FR 675455 A FR675455 A FR 675455A
Authority
FR
France
Prior art keywords
exposure devices
exposure
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
Gordon-Augustus Wearham
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 FR675455A publication Critical patent/FR675455A/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
    • G09F13/24—Illuminated signs; Luminous advertising using tubes or the like filled with liquid, e.g. bubbling liquid

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
FR675455D 1928-05-23 1929-05-21 Improvements to exposure devices Expired FR675455A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB675455X 1928-05-23

Publications (1)

Publication Number Publication Date
FR675455A true FR675455A (en) 1930-02-11

Family

ID=10492032

Family Applications (1)

Application Number Title Priority Date Filing Date
FR675455D Expired FR675455A (en) 1928-05-23 1929-05-21 Improvements to exposure devices

Country Status (1)

Country Link
FR (1) FR675455A (en)

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