A safety or protection system includes a plurality of divisions of first signals; a plurality of safety or protection subsystems each of which receives a corresponding one of the divisions of first signals and produces a corresponding plurality of second signals therefrom; and a reflective memory subsystem...http://www.google.com/patents/US5984504?utm_source=gb-gplus-sharePatent US5984504 - Safety or protection system employing reflective memory and/or diverse processors and communications
