DIFF Subgroup
A63B 39/04 Pricking-balls;
Introduced: September 1968
Title
Titles differ between systems:
IPC: Pricking balls
CPC: Pricking-balls;
Full Title
Full titles differ between systems:
IPC:
Hollow non-inflatable balls > Arrangements for maintaining the pressure > Pricking balls
CPC:
Hollow non-inflatable balls > Arrangements for maintaining the pressure > Pricking-balls;
No child classifications to compare. This is a leaf node in both IPC and CPC.