JMK was established in 1975 to design, manufacture, and distribute commercial EMI/RFI powerline filters and associated devices. With over 45 years of experience, JMK has expanded its product range to include various EMI and RFI suppression devices for commercial, military, medical, and transit applications. The company operates two manufacturing facilities and engineering departments, offering high-quality products designed to meet safety requirements. JMK's services include testing systems, selecting or designing filters to meet specific needs, and maintaining an in-house test facility for compliance testing with industry standards.