FR694068A - New device for projecting announcements on the walls of railway tunnels, by means of devices attached to the cars - Google Patents

New device for projecting announcements on the walls of railway tunnels, by means of devices attached to the cars

Info

Publication number
FR694068A
FR694068A FR694068DA FR694068A FR 694068 A FR694068 A FR 694068A FR 694068D A FR694068D A FR 694068DA FR 694068 A FR694068 A FR 694068A
Authority
FR
France
Prior art keywords
announcements
cars
projecting
walls
new device
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
Joaquin Llach
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 FR694068A publication Critical patent/FR694068A/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
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds

Landscapes

  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Marketing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
FR694068D 1930-04-15 1930-04-15 New device for projecting announcements on the walls of railway tunnels, by means of devices attached to the cars Expired FR694068A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR694068T 1930-04-15

Publications (1)

Publication Number Publication Date
FR694068A true FR694068A (en) 1930-11-28

Family

ID=9043627

Family Applications (1)

Application Number Title Priority Date Filing Date
FR694068D Expired FR694068A (en) 1930-04-15 1930-04-15 New device for projecting announcements on the walls of railway tunnels, by means of devices attached to the cars

Country Status (1)

Country Link
FR (1) FR694068A (en)

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