APPENDIX
Patents Issued to Laurens Hammond Date of U, S. Patent
Date Patent No. Description
1907 |
(France) |
Automatic gearshift for automobiles |
1912 |
1,015,886 |
Differential mercury barometer |
1920 |
1,345,767 |
Heat seal |
1922 |
15,299 (Reissue) Tickless clock |
|
1922 |
1,435,520 Teleview - stereoscopic motion pictures |
|
1924 |
1,481,006 Shadow graph |
|
1924 |
1,506,524 Stereoscopic motion picture device |
|
1928 |
1,686,854 Stereoscopic picture-viewing apparatus |
|
1929 |
1,719,805 Alternating current clock |
|
1930 |
1,744,268 Electrolytic condenser structure |
|
1930 |
1,858,947 Battery eliminator |
|
1931 |
1,796,649 Alternating current clock |
|
1931 |
1,797,912 Alternating current clock |
|
1932 |
1,867,315 Synchronous electric motor |
|
1932 |
1,873,397 method of making stator and rotor plates |
|
1932 |
1,889,729 Card table with automatic dealing mechanism |
|
1933 |
1,915,090 Synchronous electric phonograph motor |
|
1933 |
1,924,606 Electrolytic condenser |
|
1933 |
1,924,853 Alternating current clock |
|
1934 |
1,956,350 Electric organ - first patent (used a crank to start it then!) |
|
1934 |
1,960,672 Frequency-indicating and control apparatus – so power plants will keep on time – keep clocks right! |
|
1934 |
1,964,914 Card-feeding device (filed 1932) |
|
1935 |
1,998,672 Card, table |
|
1935 |
2,003,116 Electric clock motor |
|
1935 |
2,013,208 Electric clock |
|
1936 |
2,027,531 Electric alarm clock |
|
1936 |
2,042,337 Electric calendar clock (filed 1931) |
|
1937 |
2,067,708 Electric clock, self-starting |
|
1937 |
2,080,371 Self-starting mechanism for electric clock |
|
1937 |
2,099,204 Multiple key switches for organ |
|
1938 |
2,117,002 Keyboard for musical instruments |
|
1938 |
2,126,464 Electric piano |
|
1938 |
2,126,682 Novachord |
|
1939 |
2,159,505 Electric organ - improvements |
|
1939 |
2,161,706 Electric organ - gradual attack |
|
1939 |
2,184,424 Electric piano - key action |
|
1940 |
2,199,702 Method of broadcasting signals from an organ |
|
Appendix II | Index |