Wilhelm Conrad Röntgen
invented the X-rays.
Heinrich Hertz invented
electromagnetic theory of light and
electromagnetic waves.
Johannes Gutenberg invented the
Letterpress printing. It was a great
invention and was very much
appreciated then.
Albert Einstein invented the Theory
of relativity
Rudolf Diesel invented the
Combustion engine.
Manfred von Ardenne invented the
Television.
Peter Henlein invented the Pocket
watch.
Karl Friedrich von Drais invented
the Bicycle.
Philipp Reis invented the
Telephone
Karlheinz Brandenburg invented
the MP3 technology
Robert Koch invented methods to
purify the anthrax bacillus from
blood samples and grow pure
cultures.
Gottlieb Daimler invented
Automobile and internal-
combustion engines.