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By 1902, Entz was working on ways to perfect his electromagnetic transmission. The device he ultimately came up with used a magnetic field to drive a propeller or driveshaft. By varying the intensity of the field, a vehicle could go faster or slower without using a clutch. In 1912,
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purchased the patent rights to the Entz
Transmission and then licensed the technology to Raymond Owen of R. M. Owen & Company. Owen used the technology to produce a gasoline-powered automobile that utilized the Entz electromagnetic transmission, called the
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During the 1890s, Entz became fascinated with the development of the automobile, and by 1897 he was working as a chief engineer at the
Electric Storage Battery Company in
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Justus Entz was altogether granted 75 patents in automotive engineering. He died in 1947, a few days short of his 80th birthday.
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New York Times obituary, June 9, 1947 (subscription required)
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238:. On the vehicle's test run, driven by
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