Patents by Inventor Wayne L. Dorpfeld

Wayne L. Dorpfeld 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).

  • Method of making a sign having raised characters
    Patent number: 5554685
    Abstract: The invention is a composition of matter used in the making of raised characters for use in signs, and a method of manufacturing raised characters made from the composition. The matter is a polymerizable composition comprising a silicone rubber compound, and about 10 to about 50 weight percent of a silica filler based on the weight of the polymerizable composition. Moreover, the composition of matter is a curable composition comprising a vinyl resin selected from a vinyl plastisol or vinyl organosol, and about 10 to about 50 weight percent of a silica filler based on the weight of curable composition. The invention also includes a method of manufacturing raised characters for use in signs comprising machining the characters from a partially cured polymerizable material.
    Type: Grant
    Filed: October 11, 1995
    Date of Patent: September 10, 1996
    Assignee: American Tactile Corporation
    Inventors: Wayne L. Dorpfeld, Robert W. Williams, Arnold R. Wolfe
  • Composition of matter for raised characters and method for manufacturing raised characters for use in signs
    Patent number: 5504144
    Abstract: The invention is a composition of matter used in the making of raised characters for use in signs, and a method of manufacturing raised characters made from the composition. The matter is a polymerizable composition comprising a silicone rubber compound, and about 10 to about 50 weight percent of a silica filler based on the weight of the polymerizable composition. Moreover, the composition of matter is a curable composition comprising a vinyl resin selected from a vinyl plastisol or vinyl organosol, and about 10 to about 50 weight percent of a silica filler based on the weight of curable composition. The composition of matter may be a silicone rubber compound. The invention also includes a method of manufacturing raised characters for use in signs comprising machining the characters from a partially cured polymerizable material.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: April 2, 1996
    Assignee: American Tactile Corporation
    Inventors: Wayne L. Dorpfeld, Robert W. Williams, Arnold R. Wolfe
  • Apparatus for embossing Braille labels
    Patent number: 5449240
    Abstract: An apparatus for manually embossing a Braille label, comprising a work platform, means for securing a label to be embossed to the platform, an embossing lever movably secured to the platform, the lever having an embossing pin extending therefrom, wherein the lever is operatively arranged to be moved to cause the pin to emboss the label; and, means for precisely positioning the embossing pin above the label.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: September 12, 1995
    Inventors: Wayne L. Dorpfeld, Robert W. Williams, Arnold R. Wolfe