Musical instruments – Keyboard type – Element or attachment
Patent
1979-06-08
1981-01-20
Corrigan, Jane E.
Musical instruments
Keyboard type
Element or attachment
D 6186, D1701, D1799 E, D0604
Patent
active
D02579871
REFERENCES:
patent: D211494 (1968-06-01), Spranger
patent: 406921 (1889-07-01), Lohagen
patent: 3483999 (1969-12-01), Barrett
patent: 3960275 (1976-06-01), Haughton et al.
patent: 3999727 (1976-12-01), Rennemann
Corrigan Jane E.
Drake Hugh H.
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