• All sections
• E - Fixed constructions
• E02D - Foundationsexcavationsembankmentsunderground or underwater structures
• E02D 29/055 - Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location lineMethods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench further excavation of the cross-section proceeding underneath an already installed part of the structure, e.g. the roof of a tunnel

Patent holdings for IPC class E02D 29/055

Total number of patents in this class: 8

10-year publication summary

Principal owners for this class