What? DeLorean didn't event THE turn signal - just the lane-change turn signal.
As for overhead cams, Delorean put them in GM cars, which was a first. More generally, there were cars utilizing overhead cams before Delorean was even born.
They got the recessed windshield wipers right, though.
On October 19, 1982, DeLorean was charged with
trafficking in cocaine by the U.S. government, following
a videotaped sting operation in which he was recorded by
undercover Federal agents agreeing to bankroll a $1.8
million, 100 kg cocaine smuggling operation in exchange
for a $24 million cut of the eventual profits. The
government was tipped off to DeLorean by confidential
informant James Timothy Hoffman, a former neighbor, who
reported to his FBI superiors that DeLorean had
approached him to ask about setting up a cocaine deal; in
reality, Hoffman had called DeLorean and suggested the
deal (which DeLorean then accepted) as part of his
efforts to receive a reduced sentence on a 1981 Federal
cocaine trafficking charge that he was awaiting trial on.
At this point, DeLorean became suspicious that he had
become involved in a dangerous and illegal operation,
possibly involving illegal narcotics or organized crime
(or both); he felt that he needed to remove himself from
the situation as soon as possible.
However, in the face of a thinly-veiled threat by Hoffman
that DeLorean’s daughter would be murdered if he backed
out of the deal, DeLorean continued to communicate with Hoffman.