Pinkerton

==North-Western Police Agency==
===1850–????===
==Pinkerton & Co==
===????–????===
==Pinkerton's National Detective Agency==
===????–????===
==Pinkerton==
===????–1935===
===1935–1977===
===1977–1990===
===1990–present===
==External links==
Category:Securitas
Category:Law enforcement
Category:Private security
Category:Security companies
Category:Private investigators
Category:Intelligence agencies
Category:International
Category:Ann Arbor, Michigan
Category:Michigan
Category:United States
Category:1850s
Category:1850