<Li> Hans Georg Dehmelt: Physicist . Co-developed the non-magnetic quadrupole mass filter which laid the foundation for what we now call an ion trap . Shared the Nobel Prize in 1989 . </Li> <Li> Max Delbrück: German American biophysicist . He was awarded the Nobel prize for discovering that bacteria become resistant to viruses (phages) as a result of genetic mutations . </Li> <Li> Johann Christoph Denner: Woodwind instrument maker, inventor of the clarinet . </Li> <Li> Jürgen Dethloff: Inventor and engineer, co-inventor of the Smart card (together with Helmut Gröttrup). </Li>

Which woodwind instrument was invented by a german inventor