It's been 125 years since one of the auto industry's most celebrated designers filed a patent for a device that would become a central characteristic of the modern car to this very day, a prerequisite for producing a strong power output. The radiator

Wilhelm Maybach's original patent for the cross flow honeycomb radiator design unlocked the potential of gasoline engines.

Designed specifically as a high-performance alternative to earlier tube-style radiators, Maybach filed a patent for the new honeycomb radiator design, which he intended to deliver maximum cooling capacity with a compact design.

https://carbuzz.com/wilhelm-maybach-mercedes-benz-radiator-history