Patents by Inventor Joel Rosenwasser

Joel Rosenwasser 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: 5753887
    Abstract: Apparatus and methods for engraving indicia on gemstones and the gemstones created thereby. The indicia may be either decorative indicia, readily visible to the naked eye, or identification indicia, invisible to the naked eye, and is engraved on or adjacent a predetermined exterior surface portion of the gemstone. The gemstone may be semi-precious, man-made, or precious and has another exterior surface portion for engagement by a portion of the apparatus. The apparatus basically comprises a support for supporting the gemstone and laser device for generating a laser beam and for directing it beam to the predetermined exterior surface of the gemstone to engrave the indicia therein. The support is constructed to engage the other exterior surface portion of the gemstone in such a manner that a significant portion of the laser beam is precluded by the support from reflecting internally within the gemstone, thereby ensuring that the gemstone is not damaged by the laser beam.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: May 19, 1998
    Assignee: Engraving Technologies, Inc.
    Inventors: Joel Rosenwasser, James Geswelli, Todd Knichel