Benz's wife, Bertha, financed the development process. According to modern law, she would have therefore received the patent rights, but married women were not allowed to apply for patents at the time.
Benz unveiled his invention to the public on 3 July 1886, on the Ringstrasse in Mannheim.
About 25 Patent-Motorwagens were built between 1886 and 1893. (Wikipedia)
I was delighted to see how many videos there are on YouTube of this glorious clinker of a machine. And they work! It's almost like an electronic wheelchair, or one of those velocipede bicycles with the huge spoked wheels. I have mixed feelings about the internal combustion engine, of course, but my feelings are too complex to get into that now.
A glorious-looking thing. Almost impossible to believe it ran under its own steam. Ta-pocketa-pocketa-pocketa.
A gorgeous colour shot of the Benz, likely a reconstruction.