Patents by Inventor Philipp A. Frei

Philipp A. Frei has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Rolling toy with motion recording and playback capability
    Patent number: 6354842
    Abstract: A rolling device in the form of a two-wheeled toy can record and play back physical motion. In a “training mode,” the user grasps the device and draws it along a surface on a desired path. The motion is sensed and recorded in an internal memory. In a “playback mode,” the previously imparted motion is repeated—i.e., executed by internal circuitry based on the recorded motion, preferably over and over.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: March 12, 2002
    Assignee: Massachusetts Institute of Technology
    Inventor: Philipp A. Frei