https://en.wikipedia.org/wiki/John_GarandThey only thing you need to know is this.
Garand never received any royalties from his M1 rifle design despite over six and a half million M1 rifles being manufactured as he transferred all rights regarding his inventions to the U.S. on January 20, 1936.[6][16][17] A bill was introduced in Congress to award him $100,000 in appreciation, but it did not pass. Garand remained in his consulting position with the Springfield Armory until his retirement in 1953.
They kept saying they were going to build a monument honouring him, which has never materialized and never will. His selfless contribution for saving countless lives and which he had a major part in turning the war, has gone unnoticed and unrecognized. I find the treatment of him dispecable selfish and ungreatful among other choice words. Shame on you.