Patents by Inventor Charles McInvale

Charles McInvale 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).

  • Frangible concrete insert clip
    Publication number: 20050217197
    Abstract: A frangible clip and method for embedding a concrete insert into a concrete structure. The clip may include at least one frangible member which shears from a base member when a sufficient shearing force is applied. The clip may be formed of plastic as an integrally formed, single unit.
    Type: Application
    Filed: November 9, 2004
    Publication date: October 6, 2005
    Inventors: Bobbie Peacock, Charles McInvale
  • Two-sided manhole step
    Publication number: 20050150722
    Abstract: A two-sided manhole step. The step includes a first step surface and a second step surface. Lugs extend from ends of the first and second step surfaces. The lugs help to prevent individuals from sliding off the manhole step, regardless of whether the step is installed with the first step surface or second step surface facing upwards.
    Type: Application
    Filed: July 9, 2004
    Publication date: July 14, 2005
    Inventors: Bobbie Peacock, Charles McInvale
  • Two sided manhole step
    Patent number: D556917
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: December 4, 2007
    Assignee: M.A. Industries, Inc.
    Inventors: Bobbie Don Peacock, Charles McInvale
  • Two-sided manhole step
    Patent number: D490907
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: June 1, 2004
    Assignee: M.A. Industries, Inc.
    Inventors: Bobbie Don Peacock, Charles McInvale
  • Manhole lift insert with frangible positioner
    Patent number: D498131
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: November 9, 2004
    Assignee: M.A. Industries, Inc.
    Inventors: Bobbie Don Peacock, Charles McInvale