Salvarsan

The invention:

The first successful chemotherapeutic for the treatment
of syphilis

The people behind the invention:

Paul Ehrlich (1854-1915), a German research physician and
chemist
Wilhelm von Waldeyer (1836-1921), a German anatomist
Friedrich von Frerichs (1819-1885), a German physician and
professor
Sahachiro Hata (1872-1938), a Japanese physician and
bacteriologist
Fritz Schaudinn (1871-1906), a German zoologist

SAINT

The invention:

Taking its name from the acronym for symbolic automatic
integrator, SAINT is recognized as the first “expert system”—
a computer program designed to perform mental tasks requiring
human expertise.

The person behind the invention:

James R. Slagle (1934-1994), an American computer scientist

Rotary dial telephone

The invention:

The first device allowing callers to connect their
telephones to other parties without the aid of an operator, the rotary
dial telephone preceded the touch-tone phone.

The people behind the invention:

Alexander Graham Bell (1847-1922), an American inventor
Antoine Barnay (1883-1945), a French engineer
Elisha Gray (1835-1901), an American inventor

Rocket

The invention: Liquid-fueled rockets developed by Robert H. Goddard
made possible all later developments in modern rocketry,
which in turn has made the exploration of space practical.
The person behind the invention:

Robert H. Goddard (1882-1945), an American physics professor

Robot (industrial)

The people behind the invention:

Karel Capek (1890-1938), a Czech playwright
George C. Devol, Jr. (1912- ), an American inventor
Joseph F. Engelberger (1925- ), an American entrepreneur