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Alarm production over broadcasting channel by using long duration dissonant tones discordant with musical scale to prevent false actuation

US 3,391,340 A · Inventors: FYLER GEORGE W et al.

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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 July 2, 1968. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by July 2, 1985.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMay 19, 1964
GrantedJuly 2, 1968
Term endedJuly 2, 1985
Application number—
Classification (CPC)G08B27/008
Length6 pages

Timeline

Timeline From USPTO dates

1965196819711974197719801983Application filedMay 19, 1964Patent grantedJuly 2, 1968Term endedJuly 2, 1985

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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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