That's all true. Likewise I am just pointing out the underlying reasons why property deeds get more protection than stuff that the people writing the constituti

That's all true. Likewise I am just pointing out the underlying reasons why property deeds get more protection than stuff that the people writing the constitution thought was less worthy of protection. Where we stand now is that courts are less likely to say that congress has no right to shorten patent and copyright terms, than to allow congress to take land without compensation based on market value. And, in the case of non-competes, that may say even existing contracts cannot lay a proprietary claim to something between your ears.