GB2161342B - Improvements in or relating to communication apparatus - Google Patents

Improvements in or relating to communication apparatus

Info

Publication number
GB2161342B
GB2161342B GB8517100A GB8517100A GB2161342B GB 2161342 B GB2161342 B GB 2161342B GB 8517100 A GB8517100 A GB 8517100A GB 8517100 A GB8517100 A GB 8517100A GB 2161342 B GB2161342 B GB 2161342B
Authority
GB
United Kingdom
Prior art keywords
relating
communication apparatus
communication
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
GB8517100A
Other versions
GB8517100D0 (en
GB2161342A (en
Inventor
Brian George Feasey
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Publication of GB8517100D0 publication Critical patent/GB8517100D0/en
Publication of GB2161342A publication Critical patent/GB2161342A/en
Application granted granted Critical
Publication of GB2161342B publication Critical patent/GB2161342B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
GB8517100A 1984-07-07 1985-07-05 Improvements in or relating to communication apparatus Expired GB2161342B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB848417383A GB8417383D0 (en) 1984-07-07 1984-07-07 Communication apparatus

Publications (3)

Publication Number Publication Date
GB8517100D0 GB8517100D0 (en) 1985-08-14
GB2161342A GB2161342A (en) 1986-01-08
GB2161342B true GB2161342B (en) 1989-07-12

Family

ID=10563577

Family Applications (2)

Application Number Title Priority Date Filing Date
GB848417383A Pending GB8417383D0 (en) 1984-07-07 1984-07-07 Communication apparatus
GB8517100A Expired GB2161342B (en) 1984-07-07 1985-07-05 Improvements in or relating to communication apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB848417383A Pending GB8417383D0 (en) 1984-07-07 1984-07-07 Communication apparatus

Country Status (1)

Country Link
GB (2) GB8417383D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3355544B2 (en) * 1998-01-20 2002-12-09 三菱電機株式会社 Communication terminal device
US7142811B2 (en) 2001-03-16 2006-11-28 Aura Communications Technology, Inc. Wireless communication over a transducer device
CN104284275B (en) * 2013-07-12 2018-10-09 钰太芯微电子科技（上海）有限公司 A kind of microphone array system of super low noise high amplitude audio capturing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1163796A (en) * 1967-03-14 1969-09-10 Ross Electronics Corp Headphone Apparatus
GB1236773A (en) * 1967-10-11 1971-06-23 Akg Akustische Kino Geraete A microphone assembly
GB1351804A (en) * 1970-02-19 1974-05-01 Goldsmith D S Method and apparatus for picking up sounds
US4468806A (en) * 1983-05-13 1984-08-28 Gaulden Joe L Stero speaker mixer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1163796A (en) * 1967-03-14 1969-09-10 Ross Electronics Corp Headphone Apparatus
GB1236773A (en) * 1967-10-11 1971-06-23 Akg Akustische Kino Geraete A microphone assembly
GB1351804A (en) * 1970-02-19 1974-05-01 Goldsmith D S Method and apparatus for picking up sounds
US4468806A (en) * 1983-05-13 1984-08-28 Gaulden Joe L Stero speaker mixer

Also Published As

Publication number Publication date
GB8417383D0 (en) 1984-08-30
GB8517100D0 (en) 1985-08-14
GB2161342A (en) 1986-01-08

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930705