Patents Assigned to MP Electronics, Inc.
  • Voltage protection circuit for multi-drop bus of an automated coin vending machine
    Patent number: 6473283
    Abstract: A voltage protective circuit for an electronic device comprises a metal oxide varistor for eliminating spikes above a first level, and a Zener diode and a transistor connected in series through a resistor with the metal oxide varistor for eliminating spikes above a second level. The voltage protective circuit can be utilized in a separate, plug-in voltage protector for a vending machine with a multi-drop bus.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: October 29, 2002
    Assignee: MP Electronics, Inc.
    Inventors: Christopher L. Melvin, Gary L. Mee