-
Pianoharp action
-
Patent number 4,426,905
-
Issue date Jan 24, 1984
-
Ellis Barron
-
G10 - MUSICAL INSTRUMENTS ACOUSTICS
-
-
Pianoharp action
-
Patent number 4,285,261
-
Issue date Aug 25, 1981
-
Ellis Barron
-
G10 - MUSICAL INSTRUMENTS ACOUSTICS
-
-
-
Plectrum piano action
-
Patent number 4,099,440
-
Issue date Jul 11, 1978
-
Ellis Barron
-
G10 - MUSICAL INSTRUMENTS ACOUSTICS
-
3447410
-
Patent number 3,447,410
-
Issue date Jun 3, 1969
-
G10 - MUSICAL INSTRUMENTS ACOUSTICS
-
2845829
-
Patent number 2,845,829
-
Issue date Aug 5, 1958
-
G10 - MUSICAL INSTRUMENTS ACOUSTICS
-
2046333
-
Patent number 2,046,333
-
Issue date Jul 7, 1936
-
G10 - MUSICAL INSTRUMENTS ACOUSTICS