Stefan Schiffer

2 Patents

• US123292532025

  Jewelry Ring Having a RFID Transponder and a Reading Arrangement

  Egf—eduard G Fidel GmbH

  0 cites
• US117558752023

  Ring-shaped Piece of Jewelry Having an RFID Transponder

  EGF-EDUARD G. FIDEL GmbH

  0 cites