Just killin' time Trivia

smokeyjoe53":1odweogx said:
oldfat&bald":1odweogx said:
Didn't Maxim have his machine gun in the 1890's?
1884

Since we got to full auto in the 1800's, and smokeless powder was invented then also, what was really "invented" in the twentieth century? Everything else was just improving on previous work.
 
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