Patents Assigned to D & R Electronics Co., Ltd.
  • Emergency signaling system
    Patent number: D556617
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: December 4, 2007
    Assignee: D & R Electronics Co., Ltd.
    Inventors: Rinaldo Darolfi, Masimo D. Tari, Alfredo Darolfi