Indexing; Addressing; Timing Or Synchronising; Measuring Tape Travel {g11b 27/10} Patents (Class G9B/27.017)
- Means responsive to presence or absence of recorded information signals {G11B 27/22} (Class G9B/27.026)
- by sensing features on the record carrier other than the transducing track (for controlling purposes G9B/15, G9B/17); [N: sensing signals or marks recorded by another method than the main recording] {G11B 27/24} (Class G9B/27.027)
- by using information signals recorded by the same method as the main recording [N: G9B/27.026 takes precedence] {G11B 27/28} (Class G9B/27.029)