Steinway Patents

Since 1857 Steinway have registered many important patents as they developed today's piano.  Here are some of the landmark innovations that have made Steinway the piano that others have followed.

Grand Action H. Steinway Jr. May 5th 1857
Plate Flange with Agraffes H. Steinway Jr Nov 29th 1859  
Grand Overstringing H. Steinway Jr. Dec. 20th 1859 
Double Iron Frame Upright W. Steinway June 5th 1866
Upright Tubular Metallic Action Frame C.F.T. Steinway Aug 18th 1868
Soundboard Bridge Dowels C.F.T. Steinway Apr 6th 1869
Grand Tubular Metallic Action Frame C.F.T. Steinway Aug 10th 1869
Double Iron Frame Grand-Ring Bridge C.T.F. Steinway Dec 14th 1896
Duplex Scale C.T.F. Steinway May 14th 1872
Grand Construction - Cupola Plate C.T.F. Steinway May 28th 1872
Reinforced Soundboard Ribs C.T.F. Steinway Feb 11th 1873
Sostenuto Pedal  A. Steinway Oct 27th 1874
Grand Sostenuto A. Steinway June 1st 1875
Capstan C.F.T. Steinway Nov 30th 1875
Grand Capo d'Astro Agraffe C.F.T. Steinway Nov 30th 1875
Nosebolt C.F.T. Steinway June 13th 1876
Silent Keyboard Device A. Steinway May 8th 1877
Grand Case Construction C.F.T. Steinway May 21st 1878
Agraffe C.F.T. Steinway May 21st 1878
Keyframe Regulating Screw C.F.T. Steinway July 22nd 1879
Treble Keyblock Regulating Screw C.F.T. Steinway Sept 2nd 1879
Rim Bending Screw C.F.T. Steinway June 22nd 1880
Hammer Staple C.F.T. Steinway Aug 24th 1880
Hammer Waterproofing C.F.T. Steinway Aug 24th 1880
Laminated Long Bridge C.F.T. Steinway Oct 26th 1880
Grand Treble Bell C.F.T. Steinway Mar 31st 1885
Upright Plate H. Ziegler Nov 21st 1893
Upright Soundboard Support H. Ziegler Nov 2nd 1897
Key Leading F.A. Vietor Feb 25th 1936
Diaphragmatic Soundboard P.H. Bilhuber Aug 18th 1936