In the 1960s and 1970s, Kay was mostly active in radio frequency (radar and TV) industrial electronics. In fact, RF attenuators, which originated during this period of the company’s history, continued to be a part of the company’s product line until 2009. In the late 1970s, the company shifted its emphasis away from industrial electronics to speech analysis instrumentation to complement the widely used Sona-Graph.

In 1995, after more than forty years in Pine Brook, NJ, Kay Elemetrics Corp relocated its headquarters to Lincoln Park, NJ, located 25 miles (40 km) west of New York City. Then, on March 17, 2005, PENTAX Medical Company, a division of PENTAX of America, Inc. (“PENTAX”), a wholly owned subsidiary of PENTAX Corporation of Japan, and long one of the market leaders in the innovation and manufacture of medical imaging technologies for the GI, ENT, and pulmonary medical fields, acquired all of the operating assets of Kay Elemetrics.

More recently, on March 31, 2008, PENTAX Medical Company became part of the HOYA Corporation as HOYA and the PENTAX Corporation entered into a long-anticipated merger agreement. At that time, the PENTAX Corporation, including the PENTAX Medical division, became a consolidated subsidiary of HOYA.

Throughout this time, Kay’s operations have continued as a division of PENTAX Medical Company under the name “KayPENTAX.” The world leaders in speech, voice, and swallowing instrumentation, KayPENTAX boasts state-of-the-art products that are the instruments of choice in leading hospitals, clinics, and universities worldwide.