Patents by Inventor Christopher A. Welsh

Christopher A. Welsh 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).

  • Wear indicating shaving strip and blade assembly for a shaver
    Patent number: 5603161
    Abstract: A visual wear indicator which may incorporate a shaving aid, such that the visual wear indicator corresponds to released shaving agents, wear or oxidation of a cutting edge. The visual wear indicator may include a shaving aid composite which exhibits a first color to the user during an initial use and a different color during a subsequent use, wherein the transition from the first color to the second color is designed to correspond to a predetermined parameter of the shaver. The visual wear indicator may also include a metallic surface having an oxidation rate which parallels the oxidation rate of a cutting edge and provides a sufficient surface area to exhibit a second color upon detrimental oxidation of the blade.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 18, 1997
    Inventor: Christopher A. Welsh