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Piecewise helical barrel fluting
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Patent number 10,712,113
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Issue date Jul 14, 2020
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The United States of America as represented by the Secretary of the Army
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Brian Hoffman
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F41 - WEAPONS
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Compressible cartridge case
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Patent number 10,571,232
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Issue date Feb 25, 2020
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The United States of America as represented by the Secretary of the Army
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Brian R. Hoffman
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F42 - AMMUNITION BLASTING
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Crush inducing cartridge chamber
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Patent number 10,240,882
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Issue date Mar 26, 2019
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The United States of America as represented by the Secretary of the Army
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Brian R. Hoffman
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F41 - WEAPONS
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Reciprocally-cycled weapon
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Patent number 9,702,649
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Issue date Jul 11, 2017
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The United States of America as represented by the Secretary of the Army
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Brian Hoffman
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F41 - WEAPONS
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Muzzle flash suppressor
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Patent number 7,861,636
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Issue date Jan 4, 2011
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The United States of America as represented by the Secretary of the Army
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Brian R. Hoffman
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F41 - WEAPONS
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Rapid adjust muzzle system
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Patent number 7,353,740
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Issue date Apr 8, 2008
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The United States of America as represented by the Secretary of the Army
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Brian R. Hoffman
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F41 - WEAPONS