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Internal welding head assembly
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Patent number 4,857,701
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Issue date Aug 15, 1989
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CRC-Evans Pipeline International, Inc.
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Clyde M. Slavens
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Welding carriage
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Patent number 4,635,839
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Issue date Jan 13, 1987
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CRC-Evans Pipeline International, Inc.
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Clyde M. Slavens
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Welding head apparatus
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Patent number 4,631,386
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Issue date Dec 23, 1986
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Clyde M. Slavens
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Internal pipe welding apparatus
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Patent number 4,525,616
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Issue date Jun 25, 1985
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Evans Pipeline Equipment Company
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Clyde M. Slavens
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Arc welding pipe apparatus
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Patent number 4,306,134
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Issue date Dec 15, 1981
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Midcon Pipeline Equipment Co.
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Clyde M. Slavens
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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-
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Welding backup shoe apparatus
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Patent number 4,285,458
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Issue date Aug 25, 1981
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Midcon Pipeline Equipment Co.
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Clyde M. Slavens
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Traveling welding carriage
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Patent number 4,260,869
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Issue date Apr 7, 1981
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Midcon Pipeline Equipment Co.
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Clyde M. Slavens
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Track apparatus
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Patent number 4,250,813
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Issue date Feb 17, 1981
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Midcon Pipeline Equipment Co.
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Clyde M. Slavens
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Adjustable welding head oscillator
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Patent number 4,022,068
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Issue date May 10, 1977
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Central Welding Supply Co., Inc.
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Clyde M. Slavens
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR