The invention enables "low attention recording," i.e., recording that need not appreciably affect interaction of a recorder (i.e., a person in control of a recording unit according to the invention) or others with the environment in which the recording is taking place. The low attention recording enabled...http://www.google.es/patents/US6563532?utm_source=gb-gplus-sharePatente US6563532 - Low attention recording unit for use by vigorously active recorder
Low attention recording unit for use by vigorously active recorder