Stefan Roth

4 Patents

• US125607832026

  Fixed Focal Length Objective

  0 cites
• US123795802025

  Lens Having a Fixed Focal Length and Constant Overall Length for Auto Focus Applications Including Five Lens Groups of ++--+, -++-+, -+++-, -++--, +-+--, +-++- or ++++- Refractive Powers

  Leica Camera AG

  0 cites
• US121816442024

  Wide-angle Photographic Objective

  Leica Camera AG

  0 cites
• US119296852024

  Voltage Source Converter and a Method for Operation Thereof

  BOMBARDIER TRANSPORTATION GmbH

  0 cites