Tanning bed
Tanning beds became popular in Europe and America because of the work of Friedrich Wolff around 1979.  He patented his design and charged others to use his ideas. His company, "Wolff Systems" does not build the tanning beds, they research and design for the tanning lamp. Some of the early adopters of the Wolff technology include ETS, Inc., SCA, Sun Industries, Inc., Montego Bay, Sunal. Later, Friedrich sold Wolff Systems to his brother Jorg Wolff, who was the founder of Cosmedico, Ltd., another pioneer in the tanning industry.