US1688727A
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Cast-iron pipe
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US1648494A
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Pipe joint
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US1601450A
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Means for supporting core bars in flasks
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US1589652A
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Means for handling core bars and cores
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US1578083A
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Means for supporting core bars in flasks
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US1688728A
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Means for supporting cores in molds in the manufacture of tubular castings
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US1557072A
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Molding flask
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US1535676A
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Apparatus for casting pipe or the like horizontally
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US1535675A
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Pipe-foundry plant
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US1492517A
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Cast-iron pipe
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US1486777A
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Precalked joint for cast-iron pipes and method of making same
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US1480000A
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Centrifugal pipe-casting machine
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US1374750A
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Method of pouring metal in the formation of cast-iron pipes
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US1386268A
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Means for pouring metal in the formation of cast-iron pipe
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CA190943A
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Cast iron pipe
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US1288092A
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Pipe-joint.
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US1270309A
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Pipe-joint.
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US1258798A
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Pipe-joint and filler therefor.
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US1248362A
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Pipe-joint and filler therefor.
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US1264198A
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Cast-iron pipe.
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