CPC Subgroup
E21D 5/02 with wood (E21D5/01, E21D5/012, E21D5/016 take precedence)
Full Title
Lining shafts; Linings therefor (E21D11/00 takes precedence ) > with wood (E21D5/01, E21D5/012, E21D5/016 take precedence)
Search Classifications
Search for IPC and CPC classification codes or keywords