This link[0] seems to suggest that filing under a pseudonym is not possible. Full legal name, residence, and citizenship of each inventor must be provided. And

This link[0] seems to suggest that filing under a pseudonym is not possible. Full legal name, residence, and citizenship of each inventor must be provided. And there are criminal penalties for knowingly supplying the patent office with false information[1]: >1) All statements made therein of the party’s own knowledge are true, all statements made therein on information and belief are believed to be true, and all statements made therein are made with the knowledge that whoever, in any matter within the jurisdiction of the Office, knowingly and willfully falsifies, conceals, or covers up by any trick, scheme, or device a material fact, or knowingly and willfully makes any false, fictitious, or fraudulent statements or representations, or knowingly and willfully makes or uses any false writing or document knowing the same to contain any false, fictitious, or fraudulent statement or entry, shall be subject to the penalties set forth under 18 U.S.C. 1001 and any other applicable criminal statute, and violations of the provisions of this section may jeopardize the probative value of the paper; and ... [0] https://www.dhuelaw.com/blog/2017/february/is-it-possible-to-file-a-patent-application-usin/ https://www.dhuelaw.com/blog/2017/february/is-it-possible-to... [1] https://www.uspto.gov/web/offices/pac/mpep/s410.html https://www.uspto.gov/web/offices/pac/mpep/s410.html