GB333861A - Improvements in or relating to micro-telephones - Google Patents

Improvements in or relating to micro-telephones

Info

Publication number
GB333861A
GB333861A GB4210/30A GB421030A GB333861A GB 333861 A GB333861 A GB 333861A GB 4210/30 A GB4210/30 A GB 4210/30A GB 421030 A GB421030 A GB 421030A GB 333861 A GB333861 A GB 333861A
Authority
GB
United Kingdom
Prior art keywords
microphone
frame
microtelephone
accommodated
receiver
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
GB4210/30A
Other languages
English (en)
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB333861A publication Critical patent/GB333861A/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)
GB4210/30A 1929-02-09 1930-02-07 Improvements in or relating to micro-telephones Expired GB333861A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE333861X 1929-02-09

Publications (1)

Publication Number Publication Date
GB333861A true GB333861A (en) 1930-08-21

Family

ID=20308178

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4210/30A Expired GB333861A (en) 1929-02-09 1930-02-07 Improvements in or relating to micro-telephones

Country Status (3)

Country Link
BE (1) BE367612A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR689473A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB333861A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2475303A (en) * 1946-08-26 1949-07-05 Colorphone Inc Decorative cover for telephone handpieces
US4087659A (en) * 1977-01-21 1978-05-02 Boenecke Charles A Tamperproof handset for railroad applications
USD374875S (en) 1995-08-22 1996-10-22 Graves James D Housing for a portable telephone capable of hanging from a remote object

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2475303A (en) * 1946-08-26 1949-07-05 Colorphone Inc Decorative cover for telephone handpieces
US4087659A (en) * 1977-01-21 1978-05-02 Boenecke Charles A Tamperproof handset for railroad applications
USD374875S (en) 1995-08-22 1996-10-22 Graves James D Housing for a portable telephone capable of hanging from a remote object

Also Published As

Publication number Publication date
FR689473A (fr) 1930-09-08
BE367612A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Similar Documents

Publication Publication Date Title
FR2397118A1 (fr) Transducteur electro-acoustique
GB333861A (en) Improvements in or relating to micro-telephones
GB636245A (en) Improvements relating to musical instruments
JPS5217749A (en) Resonator equipped with dielectric substance
JPS524817A (en) Back-load horn speaker
GB620008A (en) Improvements in and relating to laminated core constructions
GB217579A (en) Improvements in diaphragms for telephonic apparatus
JPS5325419A (en) Speaker
USD67818S (en) Design for a loop antenna
JPS54161206A (en) Connector for plug-in telephone set
GB263476A (en) Improvements in magnetic materials
JPS51120711A (en) Speaker
JPS5367335A (en) Integrated circuit formation current matching circuit
GB233564A (en) Improvements relating to crystal detectors for wireless telegraphy and telephony
JPS5425723A (en) Multiway speaker device
GB629286A (en) Improvements in electro-magnetic relays
GB325012A (en) Improvements in, and relating to, the manufacture of moulded covers for plug-and-socket couplings and adapters
GB647353A (en) Improvements relating to sound-producing horns
JPS51113406A (en) Repeater
GB523217A (en) Improvements in or relating to electric blasting initiators
JPS5233721A (en) Diaphragm for speaker
ES31547U (es) Empalme eléctrico perfeccionado
ES61840U (es) Radioteléfono de juguete
JPS5376824A (en) Speaker
GB228871A (en) Improvements in and relating to ear pieces