| 1942 JOEL Player Attachment For Pianos Patent |
| 1926 PEDER Banjo Attachment For Pianos Patent |
| 1928 GULBRANSEN Valve For Player Pianos Patent |
| 1927 BETZ Mandolin Attachment For Pianos Patent |
| 1931 MORSE Folding Key Bed For Pianos Patent |
| 1953 WOLFE Action For Upright Pianos Patent |
| 1923 SCHENUIT Tremolo For Pianos Patent Print |
| 1935 GEORGE Action For Grand Pianos Patent Print |
| 1958 BABICKY Microphone Pickup For Pianos Patent |
| 1926 DE Music Roll For Player Pianos Patent |
| 1926 JOHANSON Sounding Board For Pianos Patent |
| 1920 GEORGE Action For Upright Pianos Patent |
| 1927 BILLINGS Drying Pad For Pianos Patent Print |
| 1926 BETZ String Plate For Grand Pianos Patent |
| 1941 MORSE Mechanism For Pianos Patent Print Art |
| 1935 EIVIND Tuning System For Pianos Patent |
| 1931 FELIX Damper Action For Grand Pianos Patent |
| 1939 DAY Rim Construction For Pianos Patent |
| 1922 SMITH Drive For Automatic Pianos Patent |
| 1940 SPERRY Tone Amplifier For Pianos Patent |
| 1920 BETZ Pneumatic Action For Pianos Patent |
| 1927 JONES Sound Board For Pianos Patent Print |
| 1921 GEORGES Harmonic Damper For Pianos Patent |
| 1931 BALDWIN CO Music Rest For Pianos Patent |
| 1926 MAX Mandolin Attachment For Pianos Patent |
| 1924 WILLIAMS Resonace Device For Pianos Patent |
| 1931 MORSE Music Rest For Pianos Patent Print |
| 1921 BATES Attachment For Player Pianos Patent |
| 1934 SHARP WILLIAM Covering For Pianos Patent |
| 1942 JONES Resonance Chamber For Pianos Patent |
| 1938 BILHUBER Soundboard For Pianos Patent Print |
| 1930 WILHELM SCHWECHTEN Bridge For Pianos Patent |
| 1924 DAVID Damper Attachment For Pianos Patent |
| 1968 ERNEST Resonator Means For Pianos Patent |
| 1930 FELIX Action For Grand Pianos Patent Print |
| 1929 POWERS String Plate For Pianos Patent Print |
| 1941 BALDWIN CO Mechanism For Pianos Patent |
| 1922 DE Camphor Holder For Pianos Patent Print |
| 1925 GEORGES Harmonic Damper For Pianos Patent |
| 1937 REINHARD Tuning Pin For Pianos Patent Print |
| 1941 BELL Sounding Board For Pianos Patent Print |
| 1928 MERITON Sounding Board For Pianos Patent |
| 1920 GEORGE Action For Grand Pianos Patent Print |
| 1931 GIZINSKY Attachment For Pianos Patent Print |
| 1942 CARL Repeat Action For Grand Pianos Patent |
| 1924 FELIX Sound Resonator For Pianos Patent |
| 1921 FRANK Plectrum Attachment For Pianos Patent |
| 1937 BILHUBER Soundboard For Pianos Patent Print |
| 1925 JOHNSON Roll For Player Pianos Patent Print |
| 1928 OSCAR Music Roll For Player Pianos Patent |
| 1931 ARTURO Auxiliary Keyboard For Pianos Patent |