Patents Assigned to William L. Brown
  • Patent number: 5629277
    Abstract: A composition for removing paint, particularly graffiti, is described which contains an alkylene carbonate, which may be propylene carbonate, butylene carbonate or mixtures thereof; propylene glycol as a hydrotrope, and a polypropylene glycol having a molecular weight of at least 200. In one embodiment, the composition also contains a hydroxyalkylcellulose thickener, for example, at least 0.5 volume percent hydroxymethylcellulose may be present. In another embodiment, the composition contains no N-methylpyrrolidone, amine, DMSO, isocetyl alcohol or surfactant, unlike some prior graffiti-removing compositions.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: May 13, 1997
    Assignee: William L. Brown
    Inventor: Martin J. Plishka
  • Patent number: 4611501
    Abstract: Apparatus enabling a vehicle operator to remotely control the positioning of an object, such as a rear view mirror, pivotally mounted on the exterior of the vehicle. The apparatus includes a support member for the object to be positioned, a base member attached to the vehicle exterior and a ball and socket joint connecting the support member to the base member. There are a pair of linkages, each including a helical spring extending between the base member and the support member. Each linkage is actuable to pivot the support member about a respective one of two mutually transverse pivotal axes. Each linkage is driven by a reversible motor operated by a four position switch inside the vehicle.
    Type: Grant
    Filed: November 20, 1985
    Date of Patent: September 16, 1986
    Assignee: William L. Brown
    Inventor: William L. Brown