FR44304E - Improvements to photo-sensitive devices - Google Patents

Improvements to photo-sensitive devices

Info

Publication number
FR44304E
FR44304E FR44304DA FR44304E FR 44304 E FR44304 E FR 44304E FR 44304D A FR44304D A FR 44304DA FR 44304 E FR44304 E FR 44304E
Authority
FR
France
Prior art keywords
photo
sensitive devices
sensitive
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR44304E publication Critical patent/FR44304E/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
FR44304D 1933-12-08 1933-12-08 Improvements to photo-sensitive devices Expired FR44304E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR44304T 1933-12-08

Publications (1)

Publication Number Publication Date
FR44304E true FR44304E (en) 1934-12-24

Family

ID=8680151

Family Applications (1)

Application Number Title Priority Date Filing Date
FR44304D Expired FR44304E (en) 1933-12-08 1933-12-08 Improvements to photo-sensitive devices

Country Status (1)

Country Link
FR (1) FR44304E (en)

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