Recording on or reproducing from the same record carrier wherein for these

Official title: Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor {(driving or moving of heads G11B3/02, G11B5/48, G11B7/08, G11B21/02)}

G11B11/00 (Recording on or reproducing from the same record carrier wherein for these) appears on 5,041 US grants and 1,532 published applications in this corpus.