Suppose a granted patent has four claims A,B,C and D. Can someone do what the patent teaches using only A,B and C only without infringing the issued patent? Ashok Mathur
Patent claims are numbered. So if a patent has claims 1, 2, 3 and 4, you can infringe on the patent if you practice even just one of the claims. However, a claim might have multiple steps in it. So if claim 1 has step a, b, c and d, you need to practice each and every step to infringe on that claim.