Before revision: For example, the Newton and Tonks businesses merged in 1970, acquired Legge in 1988 and Laidlaw in 1993, and were then taken over by Ingersoll Rand in 1997, and are today part of Ingersoll Rand Security Technologies , A H Brass was established in Harrow, North-West London in 1981 (later relocating to Edgware Road in 1984) .
After revision: For example, the Newton and Tonks businesses merged in 1970, acquired Legge in 1988 and Laidlaw in 1993, and were then taken over by Ingersoll Rand in 1997, and are today part of Ingersoll Rand Security Technologies .