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PCE
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Search for IPC and CPC classification codes or keywords
CPC Subgroup
A23P 30/38

by heating (combined with pressure release or vacuum treatment A23P30/32)

Full Title

Shaping or working of foodstuffs characterised by the process or apparatus (A23P10/00, A23P20/00 take precedence) > Puffing or expanding > by heating (combined with pressure release or vacuum treatment A23P30/32)