Cohu is a supplier of test handling solutions used by the global semiconductor industry. The company also designs and manufactures closed circuit television, metal detection and microwave equipment. Cohus business can be separated into three categories: semiconductor equipment, television cameras and other business. Delta Design, a Cohu subsidiary, is one of the worlds largest suppliers of semiconductor test handling equipment. Another subsidiary, Cohu Electronics has been a leading designer and manufacturer of closed circuit television cameras and systems for more than 40 years. In the other business category, Fisher Research Laboratory designs, manufactures and sells underground detection devices, including pipe and cable locators, water leak detectors, property marker locators and metal detectors for weekend treasure hunters; and Broadcast Microwave Services manufactures high-quality microwave communications equipment and antenna systems. Cohu originated in 1945 as Kalbfell Laboratories and changed its name to Cohu after a 1972 merger with Cohu Electronics. The company is headquartered in Poway, Calif.