Class E21D : SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
Subclass 5/10: Lining shafts; Linings therefor (E21D 11/00 takes precedence) with iron or steel (E21D 5/01, E21D 5/012, E21D 5/016 take precedence) in the form of tubbing
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11428101 | Anti-seismic support method for mine shaft | Jun 24, 21 | Aug 30, 22 | CHINA COAL RESEARCH INSTITUTE |
| 10309220 | Fastener and method of sealing passage | Mar 12, 14 | Jun 04, 19 | Relborgn Pty Ltd.; Triomviri Pty Ltd; |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2022/0018,250 | ANTI-SEISMIC SUPPORT METHOD FOR MINE SHAFT | Jun 24, 21 | Jan 20, 22 | Not available |
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