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3420311
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Patent number 3,420,311
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Issue date Jan 7, 1969
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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3183975
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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2668596
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Patent number 2,668,596
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Issue date Feb 9, 1954
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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2655106
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Patent number 2,655,106
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Issue date Oct 13, 1953
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F42 - AMMUNITION BLASTING
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2591757
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Issue date Apr 8, 1952
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B64 - AIRCRAFT AVIATION COSMONAUTICS