Tuberculosis vaccine

The invention: 

Vaccine that uses an avirulent (nondisease) strain
of bovine tuberculosis bacilli that is safer than earlier vaccines.


The people behind the invention:

Albert Calmette (1863-1933), a French microbiologist
Camille Guérin (1872-1961), a French veterinarian and
microbiologist
Robert Koch (1843-1910), a German physician and
microbiologist

Transistor radio

The invention:

 Miniature portable radio that used transistors and
created a new mass market for electronic products.

Transistor

The invention: 

A miniature electronic device, comprising a tiny
semiconductor and multiple electrical contacts, used in circuits
as an amplifier, detector, or switch, that revolutionized electronics
in the mid-twentieth century.

The people behind the invention:

William B. Shockley (1910-1989), an American physicist who led
the Bell Laboratories team that produced the first transistors
Akio Morita (1921-1999), a Japanese physicist and engineer who
was the cofounder of the Sony electronics company
Masaru Ibuka (1908-1997), a Japanese electrical engineer and
businessman who cofounded Sony with Morita