Klein and Walter Gordon were thus eventually honoured with having the equation named after them, though it seems to have taken over a quarter of a century to receive the honour. Oddly enough, Schrödinger himself privately developed a relativistic wave equation from his original wave equation, which, in reality, was not that difficult to do, and did so prior to Klein and Gordon, though he never published his results.
Klein at Walter Gordon ay kaya sa wakas pinagkaugalian sa pagkakaroon ng equation na pinangalanang matapos ang mga ito, kahit na ito tila sa may kinuha sa loob ng isang isang-kapat ng taon ng isang siglo na makatanggap ng karangalan. Nang kakatwa sapat, Schrödinger kanyang sarili ng personal na binuo ng isang relativistic kaway equation mula sa kanyang orihinal na iwagayway equation, na, sa katotohanan, ay hindi na mahirap na gawin, at kaya ay bago sa Klein at Gordon, kahit na hindi siya nai-publish na ang kanyang mga resulta.