G11B 5/187 Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features (G11B5/265, , G11B5/31 take precedence)
Introduced: January 1985
Title
Titles differ between systems:
IPC: Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to, the recording medium; Pole pieces; Gap features
CPC: Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features (G11B5/265, , G11B5/31 take precedence)
Full Title
Full titles differ between systems:
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor > Structure or manufacture of heads, e.g. inductive > Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to, the recording medium; Pole pieces; Gap features
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor (G11B11/00 take precedence) > Structure or manufacture of heads, e.g. inductive > Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features (G11B5/265, , G11B5/31 take precedence)
Of 7 combined children, 5 exist in both systems.
2 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1985.
Child Classifications
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- G11B 5/245 comprising means for controlling the reluctance of the magnetic circuit (G11B5/255 takes precedence) since 1985 +1 CPC IPC+CPC Available in IPC and CPC