FR1339246A - Mounted to prevent unwanted listening to conversations at telephone sets - Google Patents

Mounted to prevent unwanted listening to conversations at telephone sets

Info

Publication number
FR1339246A
FR1339246A FR915446A FR915446A FR1339246A FR 1339246 A FR1339246 A FR 1339246A FR 915446 A FR915446 A FR 915446A FR 915446 A FR915446 A FR 915446A FR 1339246 A FR1339246 A FR 1339246A
Authority
FR
France
Prior art keywords
conversations
prevent unwanted
telephone sets
listening
unwanted listening
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
FR915446A
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.)
Krone KG
Original Assignee
Krone KG
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 Krone KG filed Critical Krone KG
Application granted granted Critical
Publication of FR1339246A publication Critical patent/FR1339246A/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
    • H04M1/68—Circuit arrangements for preventing eavesdropping

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Devices For Supply Of Signal Current (AREA)
FR915446A 1961-11-22 1962-11-15 Mounted to prevent unwanted listening to conversations at telephone sets Expired FR1339246A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEK0045268 1961-11-22
DEK45632A DE1259392B (en) 1961-11-22 1962-01-11 Circuit arrangement to prevent eavesdropping on conversations in telephone sets

Publications (1)

Publication Number Publication Date
FR1339246A true FR1339246A (en) 1963-10-04

Family

ID=25983500

Family Applications (1)

Application Number Title Priority Date Filing Date
FR915446A Expired FR1339246A (en) 1961-11-22 1962-11-15 Mounted to prevent unwanted listening to conversations at telephone sets

Country Status (6)

Country Link
BE (1) BE624666A (en)
CH (1) CH397783A (en)
DE (1) DE1259392B (en)
FR (1) FR1339246A (en)
GB (1) GB995025A (en)
NL (1) NL285759A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3308984C2 (en) * 1983-03-14 1986-02-27 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for a digital telephone station
DE3308986C2 (en) * 1983-03-14 1986-02-27 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for a digital telephone station

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1066624B (en) * 1959-10-08 Telefonbau und Normalzeit G.m. b.H., Frankfurt/M Formwork arrangement to prevent eavesdropping on conversations

Also Published As

Publication number Publication date
CH397783A (en) 1965-08-31
BE624666A (en)
GB995025A (en) 1965-06-10
DE1259392B (en) 1968-01-25
NL285759A (en)

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