1863: The "Breast Supporter" was invented by Luman Chapman
in. It was like a corselette; a sort of half corset, that ended a
few inches below the cups. Its
selling point claimed that it would decrease friction from
corsets. For a while, his invention posed no threat to the
corset, since it was believed that only, "loose," women, and
prostitutes, went in public without a full corset. By the 1890s,
stores were selling them through mail-order catalogs, and by the 1910s,
they were sold in stores.
1913: Mary Phelps Jacobs had the first patented brassiere, after
she (with the help of her maid) helped her sew together two
handkerchiefs to wear under a sheer evening gown. The publicity
wasn't there, however, and she sold the patent in 1914 to Warners, for
$1500.
1918-1924: Flat chests and boyish figures were at the height of
fashion. Many young women bandaged or taped their breasts, or, if
they could afford it, there were items such as the Symington Side
Lacer. This trend seemed to begin in France during WWI; at that
time, Germans responded by promoting bras that enhanced breasts, saying
it was unpatriotic to buy the French minimizing bras.
For
more on 1920's fashion
1924: This trend begand to wane, however, and
instead of binding undergarments to achieve the flat effect, women
began to want support.
1935: Warners introduces cup sizes A, B, C, and D
During the Second World War and after, women were increasingly entering
the public sphere along with their traditional place in the
private. Many were working outside the home, and along with this
newfound freedom came restraints; women belonging to every class were
expected to look attractive in both spheres. Even young girls
were interested, buying into the new training bra after its invention
in
the early 1920s.

Picture Courtesy of Classicphotos.com
Of course,
the popularity of curves skyrocketed parallel to the fame of
such sex symbols as Jayne Mansfield and Marilyn Monroe. During
the early 1950s, bra manufacturers designed all sorts of sexy, sensual
creations. Lace, satin, and fur were all the rage in bras, and
certain designs were given exotic names such as, "Cleopatra," and,
"Candlelight." Erotica was everywhere, and brassiere companies
didn't hesitate to capitalize on the zeitgeist.
Of course,
there were many new, innovative bras designed during the 1950s that had
multiple purposes. Below, there are ads for the Inflatable
Bra, the Mon-E-Bra, and even the, "Bleumette Bra, " a set of two
stick-on cups.