Grayba appears to be a company with historical significance in the electronics and broadcasting industries. Based on the search results, Grayba was involved in manufacturing and distributing electronic equipment, including cabinets with specific features, and was active around the mid-20th century. The company had executive offices in the Graybar Building in New York and was associated with other locations such as Oakland, California. Grayba also had connections to the broadcasting industry, as evidenced by mentions in historical radio and television publications.