Company A has been granted a patent. Later, Company B discovered that products with the same structure as the patent were already in use. Company B claimed that the

1. Submit the invalidation of the patent to the Patent Reexamination Board;

2. Collect the promotional and sales materials of Company B for this product before Company A applied;

3. Use the novelty and creativity of the patent to invalidate Company A’s patent; novelty is the best, but you can also use the above two properties to declare invalidity.