Patents protect innovative technological achievements, such as new inventions, utility models and designs. Applying for multiple patents on the same day is generally regarded as no substantive difference or repeated application, which neither meets the requirements of novelty and innovation of the patent law nor the principle of fairness. Therefore, in order to ensure the rigor and practicability of patent application, it is not allowed to apply for duplicate patent applications on the same day.
The protection methods and requirements of patents and trademarks are different, so the problems of applying on the same day are also different.