GB2151881B - Telephone instruments - Google Patents

Telephone instruments

Info

Publication number
GB2151881B
GB2151881B GB08432466A GB8432466A GB2151881B GB 2151881 B GB2151881 B GB 2151881B GB 08432466 A GB08432466 A GB 08432466A GB 8432466 A GB8432466 A GB 8432466A GB 2151881 B GB2151881 B GB 2151881B
Authority
GB
United Kingdom
Prior art keywords
telephone instruments
instruments
telephone
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
GB08432466A
Other versions
GB2151881A (en
GB8432466D0 (en
Inventor
Walter John George Mellors
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Publication of GB8432466D0 publication Critical patent/GB8432466D0/en
Publication of GB2151881A publication Critical patent/GB2151881A/en
Application granted granted Critical
Publication of GB2151881B publication Critical patent/GB2151881B/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
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
GB08432466A 1983-12-21 1984-12-21 Telephone instruments Expired GB2151881B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB838334012A GB8334012D0 (en) 1983-12-21 1983-12-21 Telephone instruments

Publications (3)

Publication Number Publication Date
GB8432466D0 GB8432466D0 (en) 1985-02-06
GB2151881A GB2151881A (en) 1985-07-24
GB2151881B true GB2151881B (en) 1986-11-05

Family

ID=10553623

Family Applications (2)

Application Number Title Priority Date Filing Date
GB838334012A Pending GB8334012D0 (en) 1983-12-21 1983-12-21 Telephone instruments
GB08432466A Expired GB2151881B (en) 1983-12-21 1984-12-21 Telephone instruments

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB838334012A Pending GB8334012D0 (en) 1983-12-21 1983-12-21 Telephone instruments

Country Status (1)

Country Link
GB (2) GB8334012D0 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB690296A (en) * 1950-03-10 1953-04-15 Electricity Meter Mfg Company Improvements in loud speaking telephones
BE539848A (en) * 1954-07-16
GB2075304B (en) * 1980-04-30 1983-09-21 Triltronics Uk Ltd Telephone receiving equipment

Also Published As

Publication number Publication date
GB2151881A (en) 1985-07-24
GB8334012D0 (en) 1984-02-01
GB8432466D0 (en) 1985-02-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee