Stethoscope 1882 Patent Art
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Vacuum Tube 1929 Patent Art
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Air Conditioner 1916 Patent Art
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Eckdahl Computer 1960 Patent Art
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Temperature Regulator 1925 Patent Art
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Tesla Transmitter 1914 Patent Art
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Electric Generator 1894 Patent Art
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Anesthetic Machine 1919 Patent Art
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Steam Boiler 1887 Patent Art
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Motor 1888 Patent Art
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Phone System 1925
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Wright Brothers Flying Machine 1906 Patent Art Brown
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Washing Machine 1887 Patent Art
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Surveyor's Transit 1891 Patent Art
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Edison Telephone 1879 Patent Art
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Rocket 1914 Patent Art
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Neutronic Reactor Fermi and Szilard 1955 Patent Art
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Pressure System 1900 Patent Art
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Space Capsule 1963 Patent Art
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Bottle Filling Machine 1903 Patent Art
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Aircraft Propulsion 1946 Patent Art
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Photographic Camera 1929 Patent Art
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Engineer's Transit 1892 Patent Art
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Wright Brothers Flying Machine 1906 Patent Art Black
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Electro Magnetic Motor Tesla 1888 Patent Art Black
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Telegraph 1869 Patent Art
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Tesla Motor 1888 Patent Art
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Traffic Signal 1922 Patent Art
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Einstein Refrigerator 1930 Patent Art
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Propeller Shaft Bearing 1882 Patent Art
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Space Capsule 1963 Patent Art Black
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Space Capsule 1961 Patent Art #2
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Telescope 1939 Patent Art
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Combustion Engine 1934 Patent Art
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Stevens Calipers And Dividers 1886 Patent Art Black
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Eckdahl Computer 1960 Patent Art Brown
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Amphibian Aircraft 1932 Patent Art #1
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Windmill 1906 Patent Art
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Telegraph Key 1886 Patent Art
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Eckdahl Computer 1960 Patent Art Black
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Bridge 1918 Patent Art #1
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Voltaic Battery 1887 Patent Art
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Cash Register 1885 Patent Art
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Course and Log Recorder 1908 Patent Art
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Phonograph 1878 Patent Art Blue
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Lamp Socket 1890 Patent Art
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Space Capsule 1966 Mercury Patent Art Brown
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Flying Machine 1880 Patent Art
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Lantern 1887 Patent Art
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Calculator 1893 Patent Art
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Surveying Instrument 1933 Patent Art
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Oven 1886 Patent Art
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Tesla Electrical System 1900 Patent Art
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Flash Light 1927 Patent Art
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Electric Time Switch 1909 Patent Art
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Aerial Ship 1879 Patent Art
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Ship Steering 1892 Patent
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Vacuum Tube 1929 Patent Art Brown
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Camera 1887 Patent Art
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Phonograph 1878 Patent Art
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Dirigible 1927 Patent Art
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Tesla Protector 1918 Patent Art
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Submarine by Lake 1897 Patent Art Brown
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Phonograph 1878 Patent Art Black
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Airplane 1924 Patent Art
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Electric Bell 1893 Patent Art
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Field Lighting 1904 Patent Art
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Fluid Dispenser 1932 Patent Art #1
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Windmill 1889 Patent Art
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Marine Propulsion 1911 Patent Art
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Locomotive 1915 Patent Art #1
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Bridge 1918 Patent Art #2
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