The development of new inventions is promoted by the granting of patent rights, which restrict the right of anyone but the patent holders to profit from these inventions for a specified period  Without patent rights, anyone could simply copy another' s invention; consequently, inventors would have no financial incentive for investing the time and energy required to develop new products
Thus, it is important to continue to grant patent rights, or else no one will engage in original development and consequently no new inventions will be forthcoming
When an inventor sells patent rights to a manufacturer, the manufacturer makes less total profit on the invention than the inventor does.