Can you safely do anything without infringing patents? It seems like anything non-obvious can be patented, and even private use of patented processes is illegal. Can you do anything with assurance that you aren't infringing a patent? You could read through all current patents, but (a) that would take way to long and (b) what if there's a patent for a method of searching patents to endure an activity is not infringing, which describes the search method you were using? Could someone walk up to me while I'm typing this and sue me for infringing their patent on a method for accelerated typing on a smartphone? (No they couldn't, because I'm at home and they would be trespassing, but assume I'm in a public place.)
Negligent patent infringement is — obviously — not a criminal matter, and will only become one of civil nature if a proper patent infringement notice, pursuant to 35 U.S. Code § 287(b)(2), et seq., is duly served on the infringer, and the infringement continues thereafter. (Although even in the absence of it is not legal, but no action is enforceable without) Therefore, as a practical matter, they couldn't — unless one continues with infringing conduct duly served proper notice on unless the infringement is done knowingly and willfully. Additionally, &quot;non-obvious&quot; is a term of art; its case-law description gives broad discretion to patent examiners, supervisory patent examiners, the PTAB as well as the Federal Circuit and the U.S. Supreme Court — as the case stands — to decide what is &quot;obvious&quot; and what isn't. For example, there is no case law defined upper limit of how many piece of prior art may be considered together when arguing they, combined, would make a system, method or computer program product obvious. The limitations on this generally require, for e.g, that the combination have an objective; in the absence thereof, an applicant may argue that it would not have been obvious. Lastly, it is not everywhere where there is no exception for private use; the U.S. has no such exception though.
This supposes that the patentable concept can’t be learned form the operation of the whole program and hiding the invention while making use of the invention in public is not a disclosure. However, in the US there is a famous case In re Blaisdell, 242 F.2d 779, 783, 113 USPQ 289, 292 (CCPA 1957); Hall v. Macneale, 107 U.S. 90, 96-97 (1882); Ex parte Kuklo, 25 USPQ2d 1387, 1390 (Bd. Pat. App. &amp; Inter. 1992) that concluded a public demonstration that didn’t expose the inner workings did start the clock on a bar to patentability. See previous question https://patents.stackexchange.com/questions/20886/would-the-demonstration-of-an-invention-be-considered-public-disclosure The answer (from me) has the caveat that this is a pre-AIA case and courts might come to a different answer under that current law. The U.S. has viewed public use, especially commercial public use, as disqualifying (after a grace period) but the rest of the world puts its emphasis on actual disclosure of the inventive concept so this result might be different elsewhere. One thought experiment would be to analogize with an article in a widely available journal with the words Don’t read the article that starts on page 19 on the cover. From a disclosure point of view I do not think that is different from it being possible, but illegal, to read.
For the first question - No, patents are territorial. A US patent is not &quot;working&quot; anywhere else. Of course one can apply in multiple countries if the proper time frames and procedures are followed. There is a mechanism (PCT Treaty) that allows a straightforward way to apply in over a 140 countries simultaneously. Although it is frequently used, it is expensive to continue to prosecute the application in each place and even in high-value inventions only a handful of places are eventually chosen to actually pursue patents. Each country's/region's laws and processes are different and success in patenting can vary. Normally two countries would not have the same thing patented by different inventors. The patenting or publication of the first one would make it prior art to the second filed one. This should be found by the second examiner and stop a duplicate patent by a second inventor. However there can be subtle differences between similar inventions and mistakes do happen. In the case of true simultaneous invention this can happen. To get a patent, the invention must be novel - that means no one has published or patented it anywhere in the world at any time in any language. Before the AIA law in the U.S. the law said &quot;or known in this country&quot;. It could have made a loophole where something was known publicly elsewhere but did not constitute prior art in the U.S. That is now changed to be world-wide. Even if the examiner does a world wide search they might miss something and a patent might get issued even though the invention was not novel and a patent elsewhere is granted. To invalidate it the original patent owner would need to look into available procedures in country A. It might be court or it might be administrative. In most places an annual “renewal” fee must be paid to keep a patent in-force. In the U.S. a “maintenance” fee must be paid at the 3.5 year, 7.5 year and 7.5 year points in order to stay in-force. A patent who’s renewal or maintenance fee hasn’t been paid is expired for fee reasons. That can imply that it can be revived by the patent owner by paying the fees and usually a penalty. There may be a time limit or a small set of allowable circumstances to revive. A patent labeled expired for fee reasons might now be past its normal lifespan and therefore not revivable. In general patents are given to inventors and those an inventor assigns their rights to. Someone else can’t come along and revive a patent they had nothing to do with originally. There is no “re-patenting”.
Do you have permission of the person? In general, product names fall under trademark law, not copyright. And while it's possible to use the name of a non-employee as a trademark, doing so without the permission of that person is rather dangerous. That person may sue you for a number of different reasons, with different demands - chiefly financial compensation or a rename of your product.
Without a patent, your inventions are not protected (except as trade secrets). If you publish your findings, anyone can use them. It is possible to patent the specific design of your chassis. Design patents, which cover the specific aesthetic design of something, can be less expensive than utility patents, which cover functional aspects. Although your chassis is designed with functionality in mind, it will also embody an aesthetic design. That said, enforcement of patent rights (or any other rights you might hope protect your chassis) is orders of magnitude more expensive (typically millions of dollars) than merely obtaining a patent. Thus, even if you do obtain protection for the chassis design or the method of designing it, your budget may make it impractical to effectively take advantage of those protections, unless a law firm is willing to take the case on contingency.
It's not fair use. Fair use is when you do something that normally only the copyright holder can do. Playing a video game is the ordinary, intended use of the work. In the United States, ordinary use is not protected by copyright. 17 USC 106 sets out the rights protected by copyright. The include copying the work, producing derivative works, distributing the work, and so on. None of these are ordinary use. Someone could perhaps argue that you are creating a derivative work. I doubt that argument would work because you are not taking any protectable elements from the work. But if anyone did argue that, it would make sense to also argue that if that's so, your use would still be covered under fair use because it's transformative, does not substitute for the original work in any way, and takes very little of the work.
Many patent applications do not publish until 18 months after they are filed, but can be used as prior art as of their filing date. Therefore, it's not possible to find all the potential prior art that could be used against an application (assuming it hasn't been filed yet, or was filed in the last 18 months). Further, even if all the potential prior art were already public, it isn't especially practical to go through all of it. It sounds as if you've put in a good effort looking for prior art already. At this point, it may be best to file the application and see what the Examiner finds. Also, remember that if you do turn up any prior art that's material to your patent application, you are obligated to disclose it to the USPTO.
Negotiate a licence Of course, your chance of doing so are not good - computer game companies routinely pay millions to use trademarks like this (and they usually get exclusive rights) and that’s probably out of your price range. Stopping you doing what you want to do without paying for the privilege is effectively what trademarks exist to do. If the usage was incidental and clearly used Star Trek IP to identify Star Trek products, like the usage in The Big Bang Theory TV show, then that’s OK. However, your usage is using Star Trek as the core of the product and that’s not OK. Others have suggested that the trademark owner may not pursue you - that’s unlikely. Unlike copyright, trademarks that are not defended can be lost - this trademark is worth billions, they will happily spend tens of thousands to grind you into the dust.