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US1702160A
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Method of and apparatus for grinding convoluted members
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V rest for knife edges
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Metal-working machine
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Gauge
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Metal-working machine
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US1640992A
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Method of and apparatus for grinding threaded members and the like
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Gauge
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Grinding wheel
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Method of and apparatus for truing serrated grinding wheels
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Method of and apparatus for grinding worm gears
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Gauge
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Plug gauge
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Truing device for grinding wheels
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Finishing tap
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Tap
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Grinding machine
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Apparatus for and method of truing abrasive screws
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Drilling-machine feed mechanism
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Testing or measuring apparatus
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US1587518A
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Testing or measuring apparatus
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