As I understand it, no Company name, Vincent "rights", or Trademarks, were acquired by Matt Holder, merely the remaining stock, tooling and drawings.
Some time later, he registered purely the word VINCENT in the motor vehicles category. Which meant other people needed permission to make parts for motor vehicles [only] with the word Vincent on them. If they have no word on them; like say a Bottom link, no permission is needed.
Somebody else may have the word registered in another category; say clothing.
As for Bob Culver, he and others who wished to remain anonymous, have never been given proper recognition for the Rosetta-like wealth they donated to the drawings project.