Patents by Inventor Hal D. Koch

Hal D. Koch 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).

  • Child transport air filtering system
    Patent number: 7360772
    Abstract: A child transport air filtering system comprising: a child transport device; an air filtering device removeably coupled to the child transport device; a power supply removeably coupled to the child transport device, and removeably coupled to the air filtering device.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: April 22, 2008
    Inventor: Hal D. Koch