FR971885A - Reciprocal pointing device of photo-telephony or photo-telegraphy transceivers - Google Patents

Reciprocal pointing device of photo-telephony or photo-telegraphy transceivers

Info

Publication number
FR971885A
FR971885A FR971885DA FR971885A FR 971885 A FR971885 A FR 971885A FR 971885D A FR971885D A FR 971885DA FR 971885 A FR971885 A FR 971885A
Authority
FR
France
Prior art keywords
photo
telegraphy
telephony
transceivers
reciprocal
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
Jean-Baptiste-Joseph Abadie
Ozjasz Heszel Ingber
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 FR971885A publication Critical patent/FR971885A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR971885D 1940-03-23 1940-03-23 Reciprocal pointing device of photo-telephony or photo-telegraphy transceivers Expired FR971885A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR971885T 1940-03-23

Publications (1)

Publication Number Publication Date
FR971885A true FR971885A (en) 1951-01-23

Family

ID=9515546

Family Applications (1)

Application Number Title Priority Date Filing Date
FR971885D Expired FR971885A (en) 1940-03-23 1940-03-23 Reciprocal pointing device of photo-telephony or photo-telegraphy transceivers

Country Status (1)

Country Link
FR (1) FR971885A (en)

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