What impact does prior art discovered after (US) patent awarding have on enforceability and even validity of that patent? If I were to be awarded a utility patent, certificate in the mail and all, and it was later discovered by me or someone else that prior art existed before the time of the initial patent application submission, what impact would that have on the enforceability and indeed even the validity of that patent?
To successfully sue for patent infringement, you need to hold a valid patent. An issued patent is not irrefutable proof that you have a valid patent; patents are presumed valid, but the defendant can raise invalidity as a defense in an infringement suit. One of the conditions for a patent is that the invention is novel (details vary depending on filing date). Even if the USPTO doesn't think there was prior art, that doesn't mean the defendant can't try to convince the court there was prior art. If the defendant proves that the invention was not novel (or any other reason the patent is invalid), the defendant wins the infringement suit. There are a couple ways to challenge the patent for lack of novelty, which can lead to a challenge before the USPTO or before a federal court. If it's challenged before the PTO and found invalid, the holder loses the patent. If it's challenged in a lawsuit and the holder loses, they can never again assert that the patent is valid in any US court (except when appealing that decision or in a few other special cases). So if it's challenged in court and the challenger wins, the patent is also effectively invalid.
Yes, technology patents are useful. Regarding the Amazon patent you referred to, it only covers Amazon's one-click ordering (and similar single-action ordering), and it is immensely valuable to Amazon. Their competitors (essentially, anyone who sells things online) would love to use a similar system, but to do so, they must either pay Amazon a licensing fee or risk being sued for patent infringement. Beyond the value that patents can bring in court or at the negotiation table, and the value that they can have in dissuading potential competitors from taking away your business, patents can also have great defensive value. Some technology companies amass vast collections of patents for defensive purposes. They do not necessarily plan to sue anyone for patent infringement, but if one of their competitors were to sue them, they have the arsenal to effectively countersue.
Once you withdrew the complaint without prejudice, any statute of limitations benefit you obtained from filing the lawsuit evaporated. From a legal perspective, it is as if you never filed at all, except that the lawsuit that was filed proves that you had notice of the claim at the time you filed, so you cannot take advantage of any "discovery rule" that allows a statute of limitations to start running from the date that you knew or should have known of your right to file a lawsuit. In all likelihood, the statute of limitations has now run, although that would depend upon the jurisdiction in which it was filed. Some jurisdictions toll the statute of limitations during a period of minority, but that tolling might very well be insufficient to allow the claim to be filed 20 years later.
You have a false premise: "it offers the same conditions", and "MIT license is functionally equivalent to CC-BY". These premises are not true. CC-BY: applies to more than just software; it applies to artistic or literary work, databases, other material disclaims endorsement explicitly withholds moral rights explicitly does not license patent rights (MIT license gives anyone who obtains a copy of the software the right to use it, a patent right) prescribes the acceptable forms of attribution Those are just some of the differences.
There is a subtle difference between NSF policy and enforceable obligation. The primary stick that goes with the carrot is being excluded from future funding. Current policy does not generally force material in the public domain, but it is a possibility in "exceptional circumstances". There no doubt is a paper record somewhere in D.C. indicating whether such a codicil was added to any of these grants. NSF generally does not have contracts with individuals, they have contracts with institutions who have relations (typically employer-employee) with individuals, so even if there were a policy requiring works to be put in the public domain, NSF would have to go after the institution, who would have to go after the author. Since that would conflict with longstanding NSF policy on copyright, it is unlikely that they would want to pursue such an approach. The statement that McGraw-Hill Book Company announces that the material, which is copyrighted, will be available for use by authors and publishers on a royalty-free basis on or after April 30, 1970 is not itself a license, it is a suggestion that a license will com into existence. A present-tense declaration "this work is dedicated to the public domain effective April 30, 1970" can be interpreted as a license effective of a date certain. Similarly, "will be available to all publishers for use in English after December 31, 1970, and in translations after December 31, 1975" does not say that it is in the public domain effective of some date. One might say that the copyright statement is simply not well written and the author really intended the books to be in the public domain as of those dates. But without compelling evidence that the book was actually released into the public domain, a court is very unlikely to abrogate a person's property rights.
Here is an excellent (and extensive) explanation of jurisprudence regarding the "good faith exception" to the admissibility of evidence found due to an error. In short: Yes, the contraband found in Unit B would be evidence admissible in court. (Of course, evidence found in Unit B would only support charges against whomever had a nexus to that property. If the owner of Unit C had no access to Unit B, then evidence in Unit B would not per se implicate him in a crime.) Law enforcement will not return seized property if it believes the property is "contraband." As an example, in Pennsylvania a person can petition a court for return of property seized by law enforcement: Rule 588 requires the petitioner to establish entitlement to lawful possession of the property, but the motion will be rejected if the State successfully argues that the property is contraband, or "derivative contraband" (which has been defined in case law to mean there is "a specific nexus between the property and criminal activity").
I'm going to focus on one part of your question, because I think it is informative to the entire question: "By publishing those data in a copyrighted book are they now in the public domain?" Insofar as copyright is concerned, the "facts" are simply never copyrightable. What is copyrightable is the expression of the fact. So you publish a book and it contains many facts. You retain copyright over how you expressed the facts, meaning the word choice, format of presentation and so on. The discussion of this point always leads people to ask the following two questions: What if the "facts" are closely related to the way they are expressed? For example, a phonebook contains "facts" about phone numbers. The individual numbers are not subject to copyright. But if the way they were organized was clever (i.e. not merely alphabetical) the presentation may be copyrighted. Doesn't that line get blurred? Why doesn't "the presentation order" count as a "fact?" It does get blurred! And courts use nuanced case law and judgment to figure out which side of the line a given thing is. However, one backstop is that if AN EXPRESSION is so closely related to the IDEA BEING EXPRESSED that the IDEA cannot be otherwise expressed, then then the EXPRESSION is not subject to copyright protection. To answer your specific questions: The book is subject to copyright. The facts in the book are not. Someone else could publish a book with the same measurements so long as they are expressing the facts with sufficient difference from the original. I'm not familiar with CUSIP numbers. However, there are two things to say here. (A) it sounds like you are describing a contractual relationship between the people who have the numbers. This is not governed by copyright; it is governed by contract between the parties. If these numbers could be treated as a "trade secret" they might be protected IP in that way. But given that they are likely circulated at least a bit, they don't seem like candidates for "trade secret" protection. To your question, "what is the effect of one person leaking?" If "trade secret" law was doing any "work" here... then yes, the trade secret would be undone once the information was public. But like I said, its likely this is actually all about contracts not intellectual property protection. (B) The "facts" of "which number is associated with which instrument" is likely NOT subject to copyright at any time. The specific numbering code COULD BE copyrighted, but in reality is almost certainly TOO CLOSELY tied to the IDEA being expressed to be copyrighted. Could the number be expressed otherwise? If not, then its likely not protected by copyright. -- Big take away here: You seem to be confused about the concept of "facts" getting into the public domain. That's not exactly what copyright is about. Copyright would protect the expression of facts. An expression can become public domain if it is sufficiently old or if the creator designates it as public domain work. But simply "putting something out there" does nothing to alter the copyright status of the thing.
Your client is confused about how copyright law works (at least in the United States and virtually every other country I've ever heard about copyright in). If I were guessing, they read something like this from the United States Copyright Office: The copyright in a derivative work covers only the additions, changes, or other new material appearing for the first time in the work. Protection does not extend to any preexisting material, that is, previously published or previously registered works or works in the public domain or owned by a third party. and figured that because it's a derivative work, the copyright only covers the additions and changes they make, and there's no copyright protection for the original work. This misunderstands the law: the original work still has its own copyright (assuming it hasn't expired), and permission from the holder of the copyright on the original work is required to create that derivative work in the first place*. The copyright on the derivative work is separate—that is, both copyrights exist in parallel. * Some exceptions, such as fair use, exist, but would be unlikely to apply to the situation you describe.