The Benz Patent-Motorwagen, built in 1885, is widely regarded as the world's first automobile, that is, a vehicle designed to be propelled by an internal combustion engine. The vehicle was awarded the German patent number 37435, for which Karl Benz applied on 29 January 1886. Following official procedures, the date of the application became the patent date for the invention once the patent was granted, which occurred in November of that year. 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.