Patents by Inventor Robert Lawall

Robert Lawall 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).

  • Form for producing arcuate bores in poured concrete slabs
    Patent number: 4706927
    Abstract: An arcuate plastic shoe-like sleeve form with an upper open minor end and a lower open major end is provided for attachment by a mounting flange on its major end to a form structure for poured concrete slabs, such as a floor, so that, after concrete is poured and set on the form structure, an arcuate opening is produced in the slab through which a pipe, electrical conduit and the like can be easily threaded as it is moved parallel with the slab and introduced into the opening.
    Type: Grant
    Filed: November 25, 1981
    Date of Patent: November 17, 1987
    Inventor: Robert Lawall