DIFF Main Group
E21F 7/00 Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Introduced: September 1968
Title
Titles differ between systems:
IPC: Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose
CPC: Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Full Title
Full titles differ between systems:
IPC:
Methods or devices for drawing-off gases with or without subsequent use of the gas for any purpose
CPC:
Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
No child classifications to compare. This is a leaf node in both IPC and CPC.