The story
In 1903 they produced a number of two-passenger runabouts. In 1904 they manufactured boats.
Runabout
The Dingfelder Runabout weighed 500 lb (230 kg) It had custom designed engine known as the Maximotor. The early model was a 3.5 hp (2.6 kW) one-cylinder motor. The car was listed for $500 and could go a "great speed if desired" The flywheel was reportedly "very large", and there was one forward gear and no reverse. Top speed was estimated to be 4 to 20 miles and hour. The car had tiller steering and wire wheels and could seat two people.
Reviews
One magazine reported that "Mr (Max) Dingfelder is held in high esteem for his honorable business methods and sterling integrity," and "the machine has been very well received by the local trade and a nice business is anticipated."
From Wikipedia’s article on Dingfelder, shared under CC BY-SA 4.0.3