| http://www.w3.org/ns/prov#value | - n 2, 1995Mar 3, 1998Andersson; GertMonocrystalline accelerometer and angular rate sensor and methods for making and using sameUS5978972 *Jun 11, 1997Nov 9, 1999Johns Hopkins UniversityHelmet system including at least three accelerometers and mass memory and method for recording in real-time orthogonal acceleration data of a headUS6128955 *Jul 9, 1999Oct 10, 2000Mimura; NobuharuMethod for measuring
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