A variety of factors affect whether you'll have DOMS after a squatting exercise session, including the intensity of the exercise, the duration, whether you've warmed up your muscles before exercise, stretching and post-session recovery.
Many observers are of the opinion that a large precentage of software-related inventions are no longer patentable after the Supreme Court's explanation of the abstract idea exception. See BitLaw's discussion on whether software is still patentable after the Supreme Court's Alice Corp. decision and MPEP Section 2106.
A patent is a government-granted monopoly on an invention, for up to twenty years. As long as the patent is valid (the owner has to pay a yearly fee to maintain the patent), the owner can exclude others from (commercially) exploiting his invention. It may happen that two people both hold a patent on an essential aspect of an invention, and then neither of them can exploit the invention without the other's permission.