Recently, reviewed and approved by the State Intellectual Property Office, refuge chamber closed door of Shandong China Coal won the Certificate of Utility Model Patent.
Utility Model Patent in the Patent Law means any new technical solution relating to the shape, the structure, or their combination of a product, which is fit for practical use. But compared with the Invention Patent, Utility Patent is lower in technical level.
In recent years, Shandong China Coal Group attaches great importance to intellectual property development, increases investment in product research and development, and actively stimulates R&D personnel’s innovative consciousness in the field of mining equipment. As a consequence, the other day, the refuge chamber closed door (ZL 201320288398.4) developed by the Group passed the audit of the State Intellectual Property Office and won the Certificate of Utility Model Patent. 

The great success we achieved this time means we have scaled a new height in technological innovation. And it also marks we, the Group, will continuously improve our own manufacturing technology and enhance the competitiveness of products to contribute to the mining development and prosperity.