What did john glenn invent?

Answer 1

As far as we're aware, John Glenn didn't invent anything significant, except possibly

for some bills he introduced in the Senate. In any case, those wouldn't be the things

for which his name became well-known.

John Glenn was first a decorated US Marine Corps pilot, and flew the first US orbital

space mission, completing three orbits of the Earth in his space capsule, "Friendship 7",

on February 20, 1962. He was the third American in space, following sub-orbital flights

by Alan Shepard and Virgil "Gus" Grissom.

Glenn was later a Senator from Ohio (1974 to 1999) and flew aboard the Space

Shuttle at the age of 77, in 1998.

Answer 2

John Glenn was a distinguished astronaut and politician, but he did not invent any specific technology or device. He is best known for being the first American to orbit the Earth in 1962 as part of the Mercury-Atlas 6 mission.