"Henry Ford" joke

It was a sweltering August day when the Greenberg brothers entered the posh Dearborn, Michigan offices of the notoriously anti-Semitic car-maker, Henry Ford.
"Mr. Ford," announced Hyman Greenberg, the eldest of the three, "we have a remarkable invention that will revolutionize the automobile industry."
Ford looked skeptical, but their threats to offer it to the competition kept his interest piqued. "We would like to demonstrate it to you in person." After a little cajoling, they brought Mr. Ford outside and asked him to enter a black car that was parked in front of the building.
Norman Greenberg, the middle brother, opened the door of the car. "Please step inside Mr. Ford."
"What?" shouted the tycoon, "are you crazy? It must be two hundred degrees in that car!"
"It is," smiled the youngest brother, Max, "but sit down, Mr. Ford, and push the white button."
Intrigued, Ford pushed the button. All of a sudden a whoosh of freezing air started blowing from vents all around the car, and within seconds the automobile was not only comfortable, it was quite cool!
"This is amazing!" exclaimed Ford. "How much do you want for the patent?"
Norman spoke up. "The price is one million dollars." Then he paused, "And there is something else. We want the name 'Greenberg Brothers Air Conditioning' to be stamped right next to the Ford logo."
"Money is no problem," retorted Ford, "but no way will I have a Jewish name next to my logo on my cars!"
They haggled back and forth for a while and finally they settled. One and one half million dollars, and the name Greenberg would be left off. However, the first names of the Greenberg brothers would be forever emblazoned upon the console of every Ford air conditioning system.
And that is why today, whenever you enter a Ford vehicle you will see those three names clearly defined on the air-conditioning control panel:
HI NORM MAX