E21D11/34 - CPC Classification Index

ClassID:

136061 ⎘

E21D11/34 - CPC Classification

Classification description:

Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings , e.g. by assembling; Lining predominantly with metal Joints between vertical props and horizontal top bars

Recent Application in this class:

20120082515

2012-04-05

Roof and Rib Support Having Reverse C-Channel

20100054870

2010-03-04

Mine roof and rib support with reinforced channel

20090285641

2009-11-19

Mine roof and rib support device