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3665217
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Patent number 3,665,217
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Issue date May 23, 1972
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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3588002
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Patent number 3,588,002
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Issue date Jun 28, 1971
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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Patent number 3,204,894
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Issue date Sep 7, 1965
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F42 - AMMUNITION BLASTING
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2955782
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Patent number 2,955,782
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Issue date Oct 11, 1960
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B64 - AIRCRAFT AVIATION COSMONAUTICS