Piper PA-47 PiperJet
Piper Aircraft was one of the companies that tried to bring a single engine bizjet on the market. While the concept aircraft of the PiperJet - official designation PA-47-2400J - has flown, the development was stopped before any production aircraft (to be named Altaire) were built. It is also a one-off aircraft in terms of external appearance: the jet engine is mounted in the tail like a DC-10/MD-11. The low wings are straight and have winglets at the end. The windows look like those on the Piper Malibu.
Confusion possible with
Given its unique shape you are not likely to mistake any aircraft for the PiperJet.