Patents by Inventor Margaret D. Schafer

Margaret D. Schafer 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).

  • Patent number: 7509745
    Abstract: A tool (10)for measuring, marking, or cutting material, the tool formed of a rigid sheet of transparent material (11) having a plurality of lines formed thereon, and a transparent, non-removable, slip-resistant coating (17) applied to a working surface of the rigid sheet to resist slipping of the tool when applied to the material.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: March 31, 2009
    Assignee: Rulersmith, Inc.
    Inventors: Margaret D. Schafer, legal representative, Margaret D. Schafer, Ansel Kelman, David A. Ray, Randal D. Schafer
  • Patent number: 7251898
    Abstract: A transparent measuring device with enhanced visibility lines formed on a transparent substrate having opposing planar front and back surfaces and with at least one opaque line formed on one of the front and back surfaces and at least one transparent line formed on one of the front and back surfaces to be colinear with the at least one opaque line to present a composite line where the transparent line permits viewing of material on which the device is placed while highlighting the at least one opaque line for enhanced visibility. The transparent line may be formed of excitable pigment that reacts to light, such as a black light, or that retains luminance after exposure to light.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: August 7, 2007
    Inventors: Margaret D. Schafer, legal representative, Randal D. Schafer, deceased
  • Patent number: 7178249
    Abstract: A tool for measuring, marking, and cutting material, the tool formed of a rigid sheet of transparent material having a transparent flexible sheet of pressure-sensitive material removably adhered thereon to cover one side of the rigid sheet and provide a removable, non-slip surface. One or the other of the rigid and flexible sheets has a plurality of lines formed thereon, preferably two-color lines, to aid in measuring and marking material. The pressure-sensitive material is formed of a non-static cling vinyl film having plasticizers that continually migrate to the surface of the film.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: February 20, 2007
    Inventors: Margaret D. Schafer, legal representative, Randal D. Schafer, deceased
  • Patent number: 6199495
    Abstract: A method and apparatus for sewing and cutting layered cloth wherein a sewing guide formed of at least semi-rigid, compliant material is used to guide the stitching of parallel lines to create channels within which the sewing guide is placed to act as a cutting mat when cutting the layers of fabric above the sewing guide, such as with a rotary cutting tool.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: March 13, 2001
    Inventor: Margaret D. Schafer