FR1158975A - Improvements made to devices to enable telephone tapping - Google Patents

Improvements made to devices to enable telephone tapping

Info

Publication number
FR1158975A
FR1158975A FR1158975DA FR1158975A FR 1158975 A FR1158975 A FR 1158975A FR 1158975D A FR1158975D A FR 1158975DA FR 1158975 A FR1158975 A FR 1158975A
Authority
FR
France
Prior art keywords
devices
improvements made
enable telephone
telephone tapping
tapping
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
Andre Riffard
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 FR1158975A publication Critical patent/FR1158975A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6016—Substation equipment, e.g. for use by subscribers including speech amplifiers in the receiver circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR1158975D 1956-10-04 1956-10-04 Improvements made to devices to enable telephone tapping Expired FR1158975A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1158975T 1956-10-04

Publications (1)

Publication Number Publication Date
FR1158975A true FR1158975A (en) 1958-06-20

Family

ID=9651347

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1158975D Expired FR1158975A (en) 1956-10-04 1956-10-04 Improvements made to devices to enable telephone tapping

Country Status (1)

Country Link
FR (1) FR1158975A (en)

Similar Documents

Publication Publication Date Title
BE577260A (en) Improvements to recording devices.
FR1232912A (en) Improvements to control devices
FR1152441A (en) Improvements to faucets
FR1158975A (en) Improvements made to devices to enable telephone tapping
FR1232080A (en) Improvements to clutch devices
FR1161614A (en) Pipe fitting
FR1182007A (en) Gasifier for taps
FR1184654A (en) Improvements to the supply devices for burners
FR1210395A (en) Improvements to shelves for shelves
FR1140958A (en) Improvements to pipe fittings
FR1184658A (en) Pipe fitting
FR1184815A (en) Improvements to regulation devices
FR1142016A (en) Improvements to construction cranes
FR70193E (en) Improvements in connection devices for accumulator batteries
FR1154111A (en) Improvements to odontostomatology equipment
FR1220980A (en) Improvements to securing devices
FR1157578A (en) Improvements to telephone devices for divers and frogmen
FR1195541A (en) Improvements to screen devices
FR1149902A (en) Improvements to subscriber telephones
FR1141008A (en) Improvements to gluing devices
FR1166038A (en) Improvements to pipe fittings
FR1240811A (en) Improvements to hose reels
FR1145784A (en) Improvements made to oxidation devices
FR1212783A (en) Improvements to identification devices
FR1151207A (en) Improvements to vehicles fitted with lifting devices