Patents by Inventor Christopher L. Melvin

Christopher L. Melvin 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).

  • 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
  • Universal removable mounting system
    Patent number: 6053463
    Abstract: The invention is directed to a dual utility support and fastening system which comprises a first body member which is slidably engageable in a housing where the first member includes at least one selectively removable support element. In one embodiment the support element includes an internally threaded bore where the bore extends through the support element into the body.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: April 25, 2000
    Assignee: Imonex
    Inventor: Christopher L. Melvin