ESCO Technologies Inc. (ESCO) is a producer of engineered products and systems sold to customers for utility, aerospace and commercial applications. The Company operates through four segments: Filtration/Fluid Flow (Filtration), RF Shielding and Test (Test), Utility Solutions Group (USG) and Technical Packaging. The filtration segment's activities are managed by its subsidiaries, such as Crissair, Inc., PTI Technologies Inc., VACCO Industries, Westland Technologies Inc....