The title page of the patent document is printed with "CN 100378905A"? This is China's patent document. B This patent application has been granted patent right C, the first digit is 1.

CN 100378905A is the patent contribution number. CN stands for China patent, the first digit is the patent category code (1 invention, 2 utility model and 3 design), and the last letter is the patent document category identification code (A stands for the published text of the invention patent application, and the unauthorized announcement text. The text of the invention authorization is b)