US2322514A
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Valve actuating mechanism
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US2131508A
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Valve operating mechanism
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US2131507A
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Valve operating mechanism
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US1834836A
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Poppet valve for internal combustion engines
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US1741230A
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Poppet-valve action for internal-combustion engines
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US1684955A
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Poppet-valve actuating device
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US1609711A
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Valve-operating mechanism for internal-combustion engines
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US1577965A
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Valve-operating mechanism for internal-combustion engines
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US1500556A
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Valve-operating means for internal-combustion engines
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US1270941A
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Valve-operating means.
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US1268002A
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Measuring instrument.
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