DIFF Subgroup
G21F 7/005 Shielded passages through walls; Locks; Transferring devices between rooms (between glove-boxes G21F7/047)
Introduced: January 1990
Title
Titles differ between systems:
IPC: Shielded passages through walls; Locks; Transferring devices between rooms
CPC: Shielded passages through walls; Locks; Transferring devices between rooms (between glove-boxes G21F7/047)
Full Title
Full titles differ between systems:
IPC:
Shielded cells or rooms > Shielded passages through walls; Locks; Transferring devices between rooms
CPC:
Shielded cells or rooms > Shielded passages through walls; Locks; Transferring devices between rooms (between glove-boxes G21F7/047)
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 1990.
Child Classifications
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