They were the Union Stove Works, the William Wrigley Jr. Company, the Boyd Steel Spring Company, the Cummings Machine Company, and A.C. Agar & Co.
Perfetti Van Melle bills itself as the third largest confectionery manufacturer in the world after Kraft Foods (owners of Cadbury) and Mars, Incorporated (owners of Wrigley).
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Freedent is a gum manufactured by Wrigley's, was first introduced in 1975 and is marketed as the gum that "won't stick to most dental work".
It was created by Portland Mavericks left-handed pitcher Rob Nelson, and pitched to the Wrigley Company (longtime owners of the Chicago Cubs) by former New York Yankee All-Star Jim Bouton, a Maverick teammate of Nelson's, as a fun alternative to the unhealthy tobacco-chewing habit common among ballplayers in the 1970s.