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Transmission of tone to warn the operator of a momentary disablement of a telephone talking connection by a coin collector

US 2,483,206 A · Inventors: JONES ROY W

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Listed from its USPTO record in Patent Yard's full-term archive. Its claims, description and drawings are in the USPTO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Granted September 27, 1949. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by September 27, 1966.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledDecember 30, 1947
GrantedSeptember 27, 1949
Term endedSeptember 27, 1966
Application number—
Classification (CPC)H04Q3/00
Length10 pages

Timeline

Timeline From USPTO dates

1948195019521954195619581960196219641966Application filedDec 30, 1947Patent grantedSep 27, 1949Term endedSep 27, 1966

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Official USPTO records

Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

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Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comJustia PatentsFull text, claims and classification.patents.justia.comFreePatentsOnlineFull text and PDF.freepatentsonline.comEspacenetForeign family and legal status.European Patent Office

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