Company A in China needs to buy accessories B from the market for assembly to produce product A. Company B has obtained the invention patent right of B and licensed Company C to produce B, but not Ding Sheng. ...
1. You don't need the permission of Party B to buy the parts of Party C, which belongs to the situation that the patent right is exhausted.
article 69, paragraph 1, item 1 of the patent law.
2. The patent right of Party B has been infringed. (Article 11 of the Patent Law)
Not liable for compensation. (Article 7 of the Patent Law)