199131 ⎘
Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus Intermediate mediums; Apparatus or processes specially adapted for their manufacture Record carriers with multiple tracks, e.g. with complementary and partial tracks such as paired "stereo" tracks contains no documents
Multi-spool tape recording apparatus having removable mounts for supporting tape spool pairs
#2Multitrack recorder
#3Recording tape attaching method and recording tape attaching apparatus
#4Multitrack servo marks with perpendicular and longitudinal magnetic fields