GB2202411B - Improvements in or relating to devices for the deterrence of nuisance telephone calls - Google Patents

Improvements in or relating to devices for the deterrence of nuisance telephone calls

Info

Publication number
GB2202411B
GB2202411B GB8706236A GB8706236A GB2202411B GB 2202411 B GB2202411 B GB 2202411B GB 8706236 A GB8706236 A GB 8706236A GB 8706236 A GB8706236 A GB 8706236A GB 2202411 B GB2202411 B GB 2202411B
Authority
GB
United Kingdom
Prior art keywords
deterrence
relating
devices
telephone calls
nuisance 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 - Fee Related
Application number
GB8706236A
Other versions
GB8706236D0 (en
GB2202411A (en
Inventor
John David Williams
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.)
SYSTEC ENGINEERING CONSULTANTS
Original Assignee
SYSTEC ENGINEERING CONSULTANTS
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 SYSTEC ENGINEERING CONSULTANTS filed Critical SYSTEC ENGINEERING CONSULTANTS
Priority to GB8706236A priority Critical patent/GB2202411B/en
Publication of GB8706236D0 publication Critical patent/GB8706236D0/en
Publication of GB2202411A publication Critical patent/GB2202411A/en
Application granted granted Critical
Publication of GB2202411B publication Critical patent/GB2202411B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/663—Preventing unauthorised calls to a telephone set

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
GB8706236A 1987-03-17 1987-03-17 Improvements in or relating to devices for the deterrence of nuisance telephone calls Expired - Fee Related GB2202411B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8706236A GB2202411B (en) 1987-03-17 1987-03-17 Improvements in or relating to devices for the deterrence of nuisance telephone calls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8706236A GB2202411B (en) 1987-03-17 1987-03-17 Improvements in or relating to devices for the deterrence of nuisance telephone calls

Publications (3)

Publication Number Publication Date
GB8706236D0 GB8706236D0 (en) 1987-04-23
GB2202411A GB2202411A (en) 1988-09-21
GB2202411B true GB2202411B (en) 1991-01-02

Family

ID=10614046

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8706236A Expired - Fee Related GB2202411B (en) 1987-03-17 1987-03-17 Improvements in or relating to devices for the deterrence of nuisance telephone calls

Country Status (1)

Country Link
GB (1) GB2202411B (en)

Also Published As

Publication number Publication date
GB8706236D0 (en) 1987-04-23
GB2202411A (en) 1988-09-21

Similar Documents

Publication Publication Date Title
EP0444451A3 (en) 3-arylcarbonyl-1h-indoles useful as therapeutic agents
GB2209257B (en) Telephone answering device
GB2220822B (en) Telephone
GB8717272D0 (en) Speakerphone
HK96593A (en) Telephone structure
GB8701640D0 (en) Telephone set
GB2202411B (en) Improvements in or relating to devices for the deterrence of nuisance telephone calls
GB8704778D0 (en) Telephone
GB2199212B (en) Telephone
GB2211376B (en) Telephone set
AU100653S (en) Telephone set
CA59784S (en) Telephone set
CA58778S (en) Telephone set
CA57847S (en) Telephone set
KR890001048Y1 (en) Calling telephone
GB8712128D0 (en) Telephone
AU97941S (en) Telephone
AU100875S (en) Telephone
CA56938S (en) Telephone
CA56940S (en) Telephone
CA56536S (en) Telephone
CA62469S (en) Telephone answering set
GB8700894D0 (en) Personal telephone paging device
HU9203508D0 (en) Telephone according to another principle
GB8722520D0 (en) Telephone accessory

Legal Events

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