Kay Musical Instrument Company is an American musical instrument manufacturer established in 1931 by namesake Henry "Kay" Kuhrmeyer and based in Chicago, Illinois. It was formed when Kuhrmeyer bought out his financial backers in the instrument manufacturer Stromberg-Voisinet. They produced guitars, mandolins, banjos, ukuleles and were known for their use of lamination in the construction of arched top instruments.

Seeburg was an American design and manufacturing company of automated musical equipment, such as orchestrions, jukeboxes, and vending equipment. Before it began manufacturing its signature suite of jukebox products, Seeburg was considered to be one of the "big four" of the top coin-operated phonograph companies alongside AMI, Wurlitzer, and Rock-Ola. At the height of jukebox popularity, Seeburg machines were synonymous with the technology and a major quotidian brand of American teenage life. The company went out of business after being sold to Stern Electronics in 1982.