[go: up one dir, main page]

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
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
US4700383A (en) * 1984-07-24 1987-10-13 Fujitsu Limited Lock-releasing mechanism for telephone set with muting function
CA2554046A1 (en) * 2004-02-20 2005-09-01 Temco Japan Co., Ltd. Bone-conduction handset

Also Published As

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

Similar Documents

Publication Publication Date Title
FR861324A (en) Telegraph devices
FR854285A (en) Improvements to telephone devices
FR846487A (en) Improvements to talking machines
FR874909A (en) Improvements to vibrating devices
FR848160A (en) Improvements to lubrication devices
FR839335A (en) Improvements to telephone devices
FR856946A (en) Improvements to sedimentation devices
FR861434A (en) Improvements to electrical protection devices
FR847225A (en) Improvements to helicoid-type propulsion devices
FR851572A (en) Improvements to metallurgical devices
FR851571A (en) Improvements to metallurgical devices
FR853298A (en) Improvements to projection devices
FR846853A (en) Improvements to foaming devices
FR858734A (en) Improvements to electro-medical devices
FR844012A (en) Improvements to gasometers
FR846640A (en) Improvements to bookbinding devices
FR49999E (en) Improvements to gyroscopic devices
FR873908A (en) Improvements to gyroscopic devices
FR855797A (en) Improvements to gyroscopic devices
FR853847A (en) Improvements to recording devices
FR840526A (en) Improvements to drawing devices
FR868065A (en) Improvements to radiogonimetric installations
FR858828A (en) Improvements made to refrigeration devices
FR856206A (en) Improvements to cinematographic devices
FR843434A (en) Improvements to domestic smoking devices