Patents by Inventor L. Wade Shumaker

L. Wade Shumaker 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).

  • Method and equipment for simultaneous excavation and land refill with minimum operating labor
    Patent number: 5782020
    Abstract: An excavator with a wireless controlled hopper-spreader allows a single operator to strip off topsoil and spread the stripped off soil more or less evenly after a mineable substance such as gravel is removed. The hopper-spreader uses about a fifty foot conveyor and may be totally operated by an operator in the excavator cab. This combination may be both faster and cheaper than a normal dragline operation.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: July 21, 1998
    Inventor: L. Wade Shumaker