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Locking nut and bolt system
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Patent number 6,102,639
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Issue date Aug 15, 2000
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Permanent Technologies Inc.
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Robert J. DiStasio
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Locking nut and bolt system
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Patent number 5,951,224
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Issue date Sep 14, 1999
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Permanent Technologies, Inc.
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Robert J. DiStasio
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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One-way nut and bolt
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Patent number RE35937
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Issue date Oct 27, 1998
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Permanent Technologies, Inc.
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Robert J. DiStasio
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411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded f...