Patents by Inventor Martin Luther Doll, Jr.

Martin Luther Doll, Jr. 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).

  • System and method for detecting decreased performance in a refrigeration system
    Patent number: 8109104
    Abstract: Systems and methods are provided for detecting performance degradation in a refrigeration system. Specifically, the present invention provides systems and methods for detecting, at a very early stage, a low refrigerant charge and degradation in condenser performance of a refrigeration system.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: February 7, 2012
    Assignee: York International Corporation
    Inventors: Martin Luther Doll, Jr., John C. Hansen
  • SYSTEM AND METHOD FOR DETECTING DECREASED PERFORMANCE IN A REFRIGERATION SYSTEM
    Publication number: 20110259023
    Abstract: Systems and methods are provided for detecting performance degradation in a refrigeration system. Specifically, the present invention provides systems and methods for detecting, at a very early stage, a low refrigerant charge and degradation in condenser performance of a refrigeration system.
    Type: Application
    Filed: July 6, 2011
    Publication date: October 27, 2011
    Inventors: Martin Luther Doll, JR., John C. Hansen