2026-10-04 — Google Patents

URL: https://patents.google.com/ Queries: 1. inventor:Znidarsic before:priority:20200101 — one hit only, US20130202845A1 (building panel, inventor Matjaz Znidarsic, Slovenia) — unrelated. 2. (superconductor disk vibrat* radio frequency energy conversion) inventor:Frank after:priority:19960101 before:priority:20000101 — page returned no visible results (screenshot showed an empty result list). Result: negative for a Frank Znidarsic patent or published application.

Interpretation (no verdict): the 1997 letter states an application was filed 19 Oct 1997. US applications filed before 29 Nov 2000 were not published unless granted [memory, high], so an abandoned 1997 application would not be visible here. His 2012 book says the patent office denied all cold-fusion-based patents (his characterization). What would settle it: USPTO file wrapper / Patent Center search by applicant name (abandoned pre-2000 files are generally not public without a granted patent or a citing patent) [memory, medium]; or the inventor's own papers. Recheck: yes, with other query forms (e.g. "Zero Point Technologies", Johnstown PA applicant, "vars" "watts" superconductor).