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US4399657A
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Steam generation system
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US4377737A
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Electrically heated steam boiler for generating superheated steam
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US4297563A
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Electric steam generating unit
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US4249857A
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Steam turbine governor
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US4249858A
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Turbine with freely rotatable rotor
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US4252500A
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Turbine with rotors geared together
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US4201520A
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Steam turbine governor
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US3977198A
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Multiple boiler steam generation system
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US4027995A
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Steam track turbine
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US3943718A
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Steam generation system
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US2531904A
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Engine valve mechanism-transmision actuated retarding and accelerating linkage
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US2344847A
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Engine valve mechanism
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US2432649A
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Transmission actuated engine valve mechanism of the combination gear type
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