Patents by Inventor Thomas M. Curtis

Thomas M. Curtis 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).

  • Curved free standing garden sieve
    Patent number: 5624038
    Abstract: A free standing curved garden sieve of parabolic shape to separate stones and coarse matter from garden soil as the garden soil travels from upper substantially vertical portions to lower substantially horizontal portions.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: April 29, 1997
    Inventor: Thomas M. Curtis
  • Garden sieve for wheelbarrow
    Patent number: 5622266
    Abstract: A garden sieve for a wheelbarrow has a collar frame adapted to conform to and fit loosely on the rim of a wheelbarrow. A sieve frame connected to the collar frame supports a wire screen adapted for sifting granular material. A motor can be connected between the wheelbarrow and the sieve to reciprocate the wire screen. The frame can include a partially removable gate for the removal of strained material and can include roller bearings to reduce friction between the sieve and the wheelbarrow.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: April 22, 1997
    Inventor: Thomas M. Curtis