Louis Goldenberg and Alva J. Fisher have been credited with the invention of what device?

Question

Who is credited with the invention of the rotary internal combustion engine, introduced by NSU in their "Ro 80" in 1967 and used by Mazda in their "RX"models, the first of which, the RX-2, was introduced in 1970?

Answer 1

Washing Machine
1908 - Alva J. Fisher claims credit for the first electric washing machine, although there are challengers, including a Louis Goldenberg, an engineer for Ford Motor Company. Fisher called his machine "Thor," after the Norse god of thunder and lightning.