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Sleeve shuttle air gun
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Patent number 4,472,794
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Issue date Sep 18, 1984
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Bolt Technology Corporation
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Steven V. Chelminski
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G01 - MEASURING TESTING
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Bouncer type pile driver
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Patent number 4,383,582
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Issue date May 17, 1983
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Bolt Technology Corporation
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Stephen V. Chelminski
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Seismic land source
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Patent number 4,108,271
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Issue date Aug 22, 1978
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Bolt Associates, Inc.
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Stephen V. Chelminski
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G01 - MEASURING TESTING
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