Article 69 Any of the following circumstances shall not be deemed as an infringement of the patent right
Having manufactured the same product, used the same method or made necessary preparations for manufacturing or using before the patent application date, and continuing to manufacture or use only within the original scope; Article 70 using, promising to sell or selling a patent infringing product that is not known to have been manufactured and sold without the permission of the patentee for the purpose of production and operation can prove that the product is in conformity Those from legal sources shall not be liable for compensa