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Infrared spot tracker
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Patent number 5,215,465
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Issue date Jun 1, 1993
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The United States of America as represented by the Secretary of the Navy
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Albert H. Marshall
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F41 - WEAPONS
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Disappearing target
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Patent number 5,215,463
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Issue date Jun 1, 1993
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Albert H. Marshall
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F41 - WEAPONS
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Team trainer
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Patent number 5,213,503
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Issue date May 25, 1993
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The United States of America as represented by the Secretary of the Navy
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Albert H. Marshall
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F41 - WEAPONS
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Long range light pen
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Patent number 4,923,401
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Issue date May 8, 1990
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The United States of America as represented by the Secretary of the Navy
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Albert H. Marshall
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F41 - WEAPONS
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Marksmanship expert trainer
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Patent number 4,923,402
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Issue date May 8, 1990
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The United States of America as represented by the Secretary of the Navy
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Albert H. Marshall
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F41 - WEAPONS