Hinkel met electrologist Henri St. Pierre in the 1930s while Hinkel worked at the medical division of General Electric. They began work on developing an epilator that combined electrolysis and thermolysis. In 1948, the St. Pierre Epilator Company Inc., owned by St. Pierre and Hinkel, received a patent for a blended current epilator.
Hinkel also owned a chain of electrology businesses. He sold the manufacturing portion of the business in 1984, which still operates under the name A.R. Hinkel.
- Hinkel AR, Lind RW (1968). Electrolysis, Thermolysis and the Blend: the principles and practice of permanent hair removal.Los Angeles, CA: Arroway Publishers, ISBN 0-9600284-1-2