Patents by Inventor Kevin T. Johnson

Kevin T. Johnson 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).

  • Evaporative humidifier
    Patent number: 4225542
    Abstract: A sterilizable evaporative humidifier for respiratory usage having a disposable absorbent evaporative element is disclosed. The humidifier provides humidification, low pressure drop and a very short warm-up period. Electronic controls are provided to ensure safe automatic operation.
    Type: Grant
    Filed: December 12, 1978
    Date of Patent: September 30, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Thomas H. Wall, Kevin T. Johnson