Patents Represented by Attorney Lang Streich

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  • Stress plate for roof membrane fastener assembly
    Patent number: 5069589
    Abstract: A disc-shaped stress plate to be utilized with a fastener having an elongated shank integral with a disc-shaped head includes a disc having an upper and lower surface with an indentation in the upper surface and a protrusion on the lower surface. The disc can also be provided with a plurality of gripping teeth on its bottom surface and a plurality of friction enhancing protrusions on its upper surface.
    Type: Grant
    Filed: December 15, 1989
    Date of Patent: December 3, 1991
    Inventor: Stuart H. Lemke