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I think most people have a serious misunderstanding when it comes to patents. They believe patents are created to ensure inventors obtain profit from their invention. The is a consequence, NOT the purpose, of patents. The focus on the rights of patent holders at the expense of innovation in society is the problem. As you mention, patents are to foster benefit for society at large. When patents serve to block progress, then something is amiss. Every patents should be examined for how it benefits society.
From this, it follows that all the inane patents on software and business practices SERVE NO USEFUL purpose to society at large. I like your list of changes, as they would swing the balance back towards benefiting everyone, not just the inventor.
I take issue with you on this point. As a former Patent Examiner I can tell you the purpose of a grant of a patent is to protect the intellectual property of the inventor. It is to stop others stealing/modifying original inventions so as to deprive the original inventor of his rights.
Of course, this does not mean I believe there is nothing wrong with the existing system.
That is where I disagree and I disagree based on the history of patents. It is very sad that, you , as a patent examiner don't seem to know why patents were created.
The purpose of the patent is disclosure of technique or technology under the promise that only the inventor will get to use it for a limited time. When you say it's to protect IP of the inventor, you are missing the point of the whole idea of patents and their historical significance.