1864 - founded as partnership between John Jacob Bausch and Henry Lomb;

1864-1866 - traded as Bausch and Lomb, Opticians;

1866-1876 - traded as Vulcanite Optical Instrument Company;

1876 - became Bausch and Lomb Optical Company;

1877 - traded at 37 Maiden Lane, New York, United States

1882 - traded at 179 & 181 North St.Paul Street, Rochester, New York, United States

1886 - traded at 531-539 North St.Paul Street, Rochester, New York, United States

1899-1900 - traded at 515-547 North St.Paul Street, Rochester, New York, United States

1916 - incorporated as Bausch and Lomb Optical Company Limited;

1960 - incorporated as Bausch and Lomb Inc;