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Tone hole covering assembly for use in wood-wind musical instruments and a method of assembling the same

US 3,623,391 A · Inventors: NAGAO AKIRA

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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 November 30, 1971. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by November 30, 1988.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJune 18, 1970
GrantedNovember 30, 1971
Term endedNovember 30, 1988
Application number—
Classification (CPC)G10D9/047
Length3 pages

Timeline

Timeline From USPTO dates

197119731975197719791981198319851987Application filedJune 18, 1970Patent grantedNov 30, 1971Term endedNov 30, 1988

Sources & verification

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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