At the beginning of 1893 Westinghouse engineer Benjamin Lamme had made great progress developing an efficient version of Tesla's induction motor and Westinghouse Electric started branding their complete polyphase phase AC system as the "Tesla Polyphase System", noting how they believed Tesla's patents gave them patent priority over other AC systems.
Which engineer made the induction motor more efficient? In which year did Benjamin Lamme achieve success making the motor more efficient? Who called their system the "Tesla Polyphase System"?