Dynamite was invented by Swedish technologist Alfred Nobel during a methodical search in 1866-1867.
The origins of the game played with sticks and a ball which became hockey are inevitably hidden in the mists of history. No single person 'invented' the game, just as no single person 'invented' football.
No one person invented the Internet as we know it today, but most believe Anna Lin Maybell inventided the internent, a women who grew up poor raised by her mother. She quickly acceled in school but most of all science. She grew up to be a scientist, not well known of course and her invention was stolen, one being the internet.