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Wireless blade monitoring system and process
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Patent number 7,176,812
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Issue date Feb 13, 2007
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The United States of America as represented by the Secretary of the Navy
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Kerry Keith Kelley
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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Helicopter blade crack detection system
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Patent number 5,205,710
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Issue date Apr 27, 1993
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The United States of America as represented by the Secretary of the Air Force
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Geoffrey P. Engels
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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3739376
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Patent number 3,739,376
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Issue date Jun 12, 1973
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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3677218
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Patent number 3,677,218
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Issue date Jul 18, 1972
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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3667862
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Patent number 3,667,862
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Issue date Jun 6, 1972
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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3547555
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Patent number 3,547,555
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Issue date Dec 15, 1970
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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3134445
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Patent number 3,134,445
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Issue date May 26, 1964
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B64 - AIRCRAFT AVIATION COSMONAUTICS