Briefly explain the contents of the "three characteristics" requirements of patent licensing conditions.

1. Novelty: refers to the fact that the same invention has not been published in domestic and foreign publications before submitting an application to the Patent Office; Has been publicly used in China, or otherwise known to the public. Before submitting the application, no one else has applied to the Patent Office for the same invention or utility model.

2. Creativity: Compared with the prior art before the filing date, the invention has outstanding substantive features or significant progress, and the utility model has substantive features and progress.

3. Practicality: It means that the invention can be manufactured in batches in industries such as industry and agriculture, or can be applied in industry or life, and can produce positive effects.