Filing Suit For Infringment

The section 104(A) talks about the burden of the proof in cases of suits for infringement.As per section 104(A):
If the patent is granted for a process to obtain a product, then it is the duty of the defendant to prove that the process used by him to make a product, identical to the product of the plaintiff is different from that of the patented process. The patentee or a person deriving title or interest in the patent from the patentee, first has to prove that the product obtained by the process used by the defendant, is identical to the product obtained by the patented process.Further section 105 to section 114, are related to the patent infringement.