[go: up one dir, main page]

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
GB8432466D0 (en
GB2151881A (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 Company PLC
Original Assignee
General Electric Company 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 Company PLC filed Critical General Electric Company 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
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
GB8334012D0 (en) 1984-02-01
GB8432466D0 (en) 1985-02-06
GB2151881A (en) 1985-07-24

Similar Documents

Publication Publication Date Title
AU90637S (en) Telephone set
AU90638S (en) Telephone set
GB8502455D0 (en) Microphone
GB8403859D0 (en) Speakerphone
AU89920S (en) Telephone instrument
AU91335S (en) Telephone set
EP0155739A3 (en) Loudspeaking telephone instrument
GB8416032D0 (en) Telephone instruments
GB8420183D0 (en) Telephone sets
AU90448S (en) Handset
AU90281S (en) Telephone
AU93011S (en) Telephone
GB8313429D0 (en) Telephone instruments
GB8417490D0 (en) Telephone
GB8407362D0 (en) Loudspeaking telephone instrument
GB2151881B (en) Telephone instruments
GB2139054B (en) Loudspeaking telephone instruments
GB8611348D0 (en) Telephone instruments
GB2101451B (en) Telephone instrument
GB2133249B (en) Telephone sets
AU90051S (en) Telephone instrument base
CA50657S (en) Telephone instrument
CA49813S (en) Telephone instrument
CA50729S (en) Telephone instrument base
CA51030S (en) Telephone

Legal Events

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