Master Lock Co.
Title
Description
1921-present
Founded in 1921 by Harry Soref, Master Lock still produces a wide range of padlocks today. An early innovator in padlocks, Master Lock patented the Laminated Steel padlock in 1924, the same manner in which bank vaults are protected, as this advertisement boasts. Master Locks were used by federal agents in New York City during Prohibition to shut down speakeasys and were implemented in prisons in the 1950s. The company was purchased from the Soref family by American Brands (now known as Fortune Brands) and continues to produce locks today.
RRH
Founded in 1921 by Harry Soref, Master Lock still produces a wide range of padlocks today. An early innovator in padlocks, Master Lock patented the Laminated Steel padlock in 1924, the same manner in which bank vaults are protected, as this advertisement boasts. Master Locks were used by federal agents in New York City during Prohibition to shut down speakeasys and were implemented in prisons in the 1950s. The company was purchased from the Soref family by American Brands (now known as Fortune Brands) and continues to produce locks today.
RRH
Source
http://www.masterlock.com/about-us/history