Software licensing is not necessarily related to contract law. Many software licenses do not fully qualify as contracts, because they are just a grant subject

Software licensing is not necessarily related to contract law. Many software licenses do not fully qualify as contracts, because they are just a grant subject to qualification, rather than an (assumed) agreement between parties about terms of exchange or something to that effect. I'm not entirely sure how patent grant drags in contract law, though. It might be the fact that it implies reciprocal patent grants. You might have to ask a lawyer for the distinguishing issue here.