Patents by Inventor Margaret Schafer

Margaret 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).

  • Non-slip measuring tool and method of making
    Publication number: 20070175052
    Abstract: A tool for measuring, marking, or cutting material, the tool formed of a rigid sheet of transparent material having a plurality of lines formed thereon, and a transparent, non-removable, slip-resistant coating applied to a working surface of the rigid sheet to resist slipping of the tool when applied to the material.
    Type: Application
    Filed: July 30, 2004
    Publication date: August 2, 2007
    Applicant: Rulersmith, Inc.
    Inventors: Randal Schafer, Margaret Schafer, Ansel Kelman, David Ray
  • Transparent measuring device with enhanced visibility lines
    Publication number: 20050178013
    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: Application
    Filed: January 6, 2005
    Publication date: August 18, 2005
    Inventors: Randal Schafer, Margaret Schafer
  • Transparent measuring device with enhanced visibility lines
    Patent number: 6839971
    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: July 17, 2003
    Date of Patent: January 11, 2005
    Inventors: Margaret Schafer, Randal D. Schafer
  • Transparent measuring device with enhanced visibility lines
    Publication number: 20040088870
    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: Application
    Filed: July 17, 2003
    Publication date: May 13, 2004
    Inventors: Randal D. Schafer, Margaret Schafer