DIFF Subgroup
E21D 15/51 specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Props; Chocks > Component parts or details of props > specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
CPC:
Props (in the building art E04G25/00); Chocks > Component parts or details of props (E21D15/43, E21D15/58, E21D15/60 take precedence) > specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Child Classifications
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