Back in 2017 I signed a patent contract with the company in which I used to work as one of the co-authors of an invention that was going to be patented in Europe. In this contract I was forced (otherwise I was going to be fired and I couldn't afford to lose my job at the moment) to renounce to any property over the invention. In turn the company compromised in the contract to recognize me as one of the author's of the patent. A while after I left that company, because my relationship with it wasn't the best . Today, they contacted me saying that I need to sign another document full of terms that I don't agree with, for them to be able to extend the original patent to United States. The difference is that this time they can't say they will fire me if I don't sign. So instead they are saying that my name won't appear as one of the co-authors in United States. Would this be possible? A patent with less authors in US than in Europe? Wouldn't they be breaking the first agreement they made to recognize me as a co-author?

  • The standard employment agreement (at least in my experience) is that if you are paid for work, your employer owns your work product. This has been true for me over my entire career. Why would you expect to be compensated beyond your contract for being an inventor if you did the inventing while being employed?
    – Eric S
    Feb 5, 2019 at 21:57
  • When I was hired I didn't have to sign an employment agreement. I agreed to work as a freelancer for the European company from a 3rd world country. My salary was 20 times less the salary in europe. Nobody believed in us. Until we did it. After that they came with a bunch or legal topics and restrictions
    – VMMF
    Feb 5, 2019 at 22:02
  • So the question of whether you retain any ownership rights to work done for a fee is one you might want to ask on the Law SE site. This likely depends on the country you were in at the time of the work. As I said, the general rule of thumb is that if you got paid for the work the person who paid you owns the work. However, I'm in the US and I am not a lawyer.
    – Eric S
    Feb 5, 2019 at 22:05
  • I have no problem with them being the owners and I'm just the author. The problem is that the document contains additional unnecessary things forbidding me from work on similar fields or talk about anything related to the patent for 10 years
    – VMMF
    Feb 5, 2019 at 22:09
  • Weird. The patent publishes so it isn’t a secret. I’d post a question on the Law SE site about the documents. I certainly wouldn’t sign something that limits my future employment without significant money as compensation.
    – Eric S
    Feb 5, 2019 at 23:08

1 Answer 1


Especially in the U.S., correct inventorship is important. Co-inventors are not strictly analogous with co-authors. In the U.S., all true inventors must be listed. An inventor is someone who makes a conceptual contribution to something that is claims. The only legitimate reasons to remove an inventor would either be for them to decide that you were listed inventor for EPO purposes (where correct inventorship is not as critical) but never really qualified as an inventor under U.S. rules; or for the one or more claims in the EPO version you particularly contribute to be dropped from the U.S. application.

Under the new (2012) AIA U.S. patent law, if the company has a signed papers from you agreeing to sign any and all required documents, they can do without your signature by swearing they tried to get you to sign and attaching copies of what you signed previously.

  • Thanks for your answer. What is an inventor for EPO purposes or EPO version?
    – VMMF
    Feb 5, 2019 at 11:14
  • wikipedia says ". . . In some patent law frameworks, however, such as in the European Patent Convention (EPC) and its case law, no explicit, accurate definition of who exactly is an inventor is provided. The definition may slightly vary from one European country to another. Inventorship is generally not considered to be a patentability criterion under European patent law."
    – George White
    Feb 5, 2019 at 21:53
  • If the patent had another inventor and he wasn't added in Europe because of disagreements between him and the company. Does this mean that the patent without him is illegal in US?
    – VMMF
    Feb 5, 2019 at 21:58
  • Until recently patents were being invalidated for incorrect inventorship. That changed with the 2012 AIA law change. Now inventorship can be corrected even after it is challenged in court and no one needs to sign something saying it was without deceptive intent.
    – George White
    Feb 5, 2019 at 22:05
  • 1
    No - I'm saying that if they do not list the true inventors in Europe nobody cares. If they do not list the true inventors in the U.S, it is a problem but it is not a fatal unfixable problem.
    – George White
    Feb 6, 2019 at 19:14

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