Patents Assigned to Machina
  • Pen recorder
    Patent number: 5313557
    Abstract: A pen recorder comprises a hollow pen body having a proximal end and a distal end a solid state audio recorder in its interior. A retractable pen mechanism is mounted on the distal end of the pen body, and a microphone transducer and speaker transducer are mounted at the proximal end. The speaker transducer is transversely mounted across an open proximal end of the pen body so that the interior of the pen body acts as a resonator improving the sound quality of the speaker.
    Type: Grant
    Filed: December 17, 1991
    Date of Patent: May 17, 1994
    Assignee: Machina
    Inventor: Ralph Osterhout