HPD, or Haugum Product Design, was established by Ragnhild Haugum in the mid-90's, while she resided in New York City. She runs her company out of Trondheim, Norway.
Haugum Product Design: Logo
Ragnhild used to model every one of her inventions by hand out of blue styrofoam. This notion of hands-on 3D modeling inspired the three D's in her logo.