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US2073178A
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Composite metal motor valve
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US2043773A
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Composite metal valve fabricating apparatus
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US2037340A
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Composite metal article of manufacture
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US2045799A
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Form for use in fabricating motor valves
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US2074859A
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Internal combustion engine
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US2017294A
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Poppet valve
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US1823953A
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Gas meter
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US1735695A
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Valve tappet
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US1651547A
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Apparatus for and method of making composite metal articles by arc welding
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US1655821A
|
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Valve grinder
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US1650389A
|
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Valve grinder
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US1628911A
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Electrically-welded valve tappet
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US1594558A
|
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Valve tappet
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US1582883A
|
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Valve tappet and like article
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US1560099A
|
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Heat-resisting alloy steel and articles made therefrom
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US1644793A
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Valve tappet and analogous articles
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US1449193A
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Valve tappet for internal-combustion engines
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US1441450A
|
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Poppet valve for internal-combustion engines
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US1461560A
|
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Valve tappet for internal-combustion engines
|
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US1444210A
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Poppet valve for internal-combustion engines
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