Patents by Inventor Marvin K. Harris

Marvin K. Harris 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).

  • Tamping apparatus
    Patent number: 4005944
    Abstract: An articulated tractor-type vehicle having a supporting frame including a pivotable boom to which a steerable wheel is mounted. The supporting frame carries an adjustably positionable tamping unit and an adjustably positionable trench filling unit such as a drag conveyor to provide simultaneous filling and tamping of a trench. A novel reciprocating tamping unit having increased effectiveness and reduced shock transmission is described.
    Type: Grant
    Filed: August 6, 1975
    Date of Patent: February 1, 1977
    Inventor: Marvin K. Harris