FR854285A - Improvements to telephone devices - Google Patents

Improvements to telephone devices

Info

Publication number
FR854285A
FR854285A FR854285DA FR854285A FR 854285 A FR854285 A FR 854285A FR 854285D A FR854285D A FR 854285DA FR 854285 A FR854285 A FR 854285A
Authority
FR
France
Prior art keywords
telephone devices
telephone
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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 Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Application granted granted Critical
Publication of FR854285A publication Critical patent/FR854285A/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
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
FR854285D 1938-05-18 1939-05-04 Improvements to telephone devices Expired FR854285A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB219316X 1938-05-18

Publications (1)

Publication Number Publication Date
FR854285A true FR854285A (en) 1940-04-09

Family

ID=10171212

Family Applications (1)

Application Number Title Priority Date Filing Date
FR854285D Expired FR854285A (en) 1938-05-18 1939-05-04 Improvements to telephone devices

Country Status (5)

Country Link
US (1) US2245835A (en)
BE (1) BE434077A (en)
CH (1) CH219316A (en)
FR (1) FR854285A (en)
GB (1) GB514905A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624808A (en) * 1949-03-30 1953-01-06 Nat Pneumatic Co Inc Signaling switch device
US3277243A (en) * 1962-12-19 1966-10-04 Burroughs Corp Telephone adapter
KR900003620B1 (en) * 1984-07-24 1990-05-26 후지쓰가부시끼가이샤 Lock-releasing mechanism for telephone set with muting function
CN1898939A (en) * 2004-02-20 2007-01-17 株式会社坦姆科日本 Bone-conduction handset

Also Published As

Publication number Publication date
CH219316A (en) 1942-01-31
US2245835A (en) 1941-06-17
GB514905A (en) 1939-11-21
BE434077A (en)

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