Patents by Inventor Donald A. Markham

Donald A. Markham 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).

  • Patent number: 6499435
    Abstract: The portable corral has a series of fence sections. Each fence section is preferably formed by a telescoping panel, which has a first female panel and a second male panel, which telescope into or out of each other, thereby permitting the length thereof to be adjusted. The slidable or telescoping panels have base receivers to support the panels or the fence sections as desired. Fasteners also join adjacent sections together, in order to form the corral into its desired shape.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: December 31, 2002
    Inventor: Donald A. Markham
  • Publication number: 20020148411
    Abstract: The portable corral has a series of fence sections. Each fence section is preferably formed by a telescoping panel, which has a first female panel and a second male panel, which telescope into or out of each other, thereby permitting the length thereof to be adjusted. The slidable or telescoping panels have base receivers to support the panels or the fence sections as desired. Fasteners also join adjacent sections together, in order to form the corral into its desired shape.
    Type: Application
    Filed: April 17, 2001
    Publication date: October 17, 2002
    Inventor: Donald A. Markham
  • Patent number: 4264081
    Abstract: A fireplace implement for hauling and storing wood adjacent a fireplace comprising a cart having open sides, cradling fore and aft frames, handle members bridging between the top of fore and aft frames. The resulting assemblage is a vertically elongated cart which may be displaced in either direction parallel to four wheels which are floor or ground engaging when the cart is vertically erect and which accommodate support of the load on either set of two wheels when the cart is tilted for displacement across selected terrain, ground, floors and/or stairs, an curvilinear runner being provided adjacent each axle mounted idler wheel to assist in negotiating stairs. As a result, the cart provides ready access for loading and unloading at either open side of the cart and, when loaded, presents a relatively narrow vertical stack of firewood which may be retained in the cart, transported to a fireplace or like location and left stored out of the way though adjacent the fireplace for use from time to time.
    Type: Grant
    Filed: November 16, 1979
    Date of Patent: April 28, 1981
    Inventor: Donald A. Markham