Wilmington

STAFFORD MANUFACTURING CORP.

Massachusetts Since:

1975

STAFFORD MANUFACTURING CORP.

SECURITY INNOVATION, INC.

Massachusetts Since:

2004

SECURITY INNOVATION, INC.

SCULLY SIGNAL COMPANY

Massachusetts Since:

1936

SCULLY SIGNAL COMPANY

RIGAKU ANALYTICAL DEVICES, INC.

Massachusetts Since:

2011

RIGAKU ANALYTICAL DEVICES, INC.

PVD PRODUCTS, INC.

Massachusetts Since:

2000

PVD PRODUCTS, INC.

PRINTERS OIL SUPPLY CO, INC.

Massachusetts Since:

1969

PRINTERS OIL SUPPLY CO, INC.

ONTO INNOVATION INC

Massachusetts Since:

1975

ONTO INNOVATION INC

KIRKWOOD HOLDINGS, INC

Massachusetts Since:

1973

KIRKWOOD HOLDINGS, INC

INDUSTRIAL MOTIONS ENGINEERING, INC.

Massachusetts Since:

1998

INDUSTRIAL MOTIONS ENGINEERING, INC.

ENERGETIQ TECHNOLOGY, INC.

Massachusetts Since:

2004

ENERGETIQ TECHNOLOGY, INC.

DAWSON MACDONALD CO INC

Massachusetts Since:

1928

DAWSON MACDONALD CO INC

ACTION AMBULANCE SERVICE INC

Massachusetts Since:

1977

ACTION AMBULANCE SERVICE INC

POWER LINE CONTRACTORS, INC.

Massachusetts Since:

1993

POWER LINE CONTRACTORS, INC.

VECTOR ELECTROMAGNETICS LLC

Ohio Since:

2013

VECTOR ELECTROMAGNETICS LLC

OASIS AVIATION SERVICES, LLC

Ohio Since:

2015

OASIS AVIATION SERVICES, LLC