[1] Bobby pins can also be used to hold head coverings such as headbands, bandannas, and yarmulkes in place.
[2] Attributes, such as the clipping action or having a readily available thin, flat piece of metal, mean the bobby pin can be used in other ways as well: Like barrettes, decorated bobby pins are sometimes meant to be noticed in hair.
They are made this way to help with the grip factor and they stay closer and more tightly attached to the hair that it is pinned to.
[7] A trademark on the term "bobbie pin" was held for some decades by Smith Victory Corporation of Buffalo, New York.
A trademark infringement claim made by Smith Victory Corporation against Procter & Gamble regarding their naming their home permanent product Bobbi was settled in the 1950s by a payment to Smith Victory Corporation by P&G.