The Kobayashi Maru was not invented by Spock. It is a part of Start Fleet Acadamy training. And I can't recall any invention that Mr. Spock came up with.

Kobayashi Maru The Kobayashi Maru is a test in the fictional Star Trek universe. It is a Starfleet training exercise designed to test the character of cadets in the command track at Starfleet Academy. The Kobayashi Maru test was first depicted in the opening scene of the film Star Trek II: The Wrath of Khan and also appears in the 2009 film Star Trek. This provided context for how the main character ensign (later admiral) James T. Kirk deals with the possibility of unwinnable situations in general and death in particular.

The Kobayashi Maru. Spock created it to test how Cadet's would respond to a no-win scenario.

The cast of Kaidan Kakuidori - 1961 includes: Eiji Funakoshi Katsuhiko Kobayashi Bonta Maru as Zenryuu Koichi Mizuhara Chieko Murata Yasuko Nakata