Helmut Schmidt, Frank Hutter, Karl Heinz Haas, Ernst Obermeier, Ulrich Steger, Hanns Erik Endres, Stephan Drost: Sensors for selectively determining liquid-phase or gas-phase components using a heteropolysiloxane sensitive layer. Fraunhofer Gesellschaft zur Forderung der angewandten Forschung e V, Oblon Spivak McClelland Maier & Neustadt, October 31, 1989: US04878015 (13 worldwide citation)

A description is given of sensors in in the form of field effect transistors and capacitors which are suitable for qualitatively and quantitatively determining species to be analyzed, for example molecules or ions, in liquid or gaseous media. A special field of application is the selective determina ...

Hans Joachim Koschlig, Frank Hutter, Helmut Schmidt: Supported catalyst and process for its production for the reduction of nitrogen oxides. Dr C Otto Feuerfest, Oblon Spivak McClelland Maier & Neustadt, April 10, 1990: US04916106 (11 worldwide citation)

A supported catalyst suitable for nitrogen oxide reduction has an active catalyst coating containing metal oxides, which has been produced by a sol-gel process, on a solid porous supporting body.

Frank Hutter, Hans Heidolph, Michael Tettenborn: Portable electric fan assembly. Caframo, Eckert Seamans Cherin & Mellott, November 17, 1992: US05163814 (3 worldwide citation)

A portable electric fan assembly for indoor use includes a base member, an upright electric motor mounted in the base member, an upstanding neck extending from the base member, a substantially vertical drive shaft couple to the motor extending within the upstanding neck, a fan head assembly carried ...