Patents by Inventor David W. Pierce

David W. Pierce 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).

  • High uniformity telecentric illuminator
    Patent number: 11868049
    Abstract: Described is a telecentric illuminator that can be used, for example, in a mask aligner system for semiconductor wafer processing or as part of a solar simulator system for characterization of solar cells. The telecentric illuminator includes a tapered optic, a lens group having a plurality of lenses and an aperture stop, and a hybrid Fresnel lens. The Fresnel lens is disposed at a position along the optical axis of the telecentric illuminator to generate a telecentric image of the aperture stop at an illumination plane. The Fresnel lens may have a curved central portion and the aperture stop may be apodized to achieve desired illumination characteristics and improve the resolution of a mask aligner system.
    Type: Grant
    Filed: April 12, 2022
    Date of Patent: January 9, 2024
    Assignee: Innovations in Optics, Inc.
    Inventors: Thomas J. Brukilacchio, David W. Pierce
  • HIGH UNIFORMITY TELECENTRIC ILLUMINATOR
    Publication number: 20220334498
    Abstract: Described is a telecentric illuminator that can be used, for example, in a mask aligner system for semiconductor wafer processing or as part of a solar simulator system for characterization of solar cells. The telecentric illuminator includes a tapered optic, a lens group having a plurality of lenses and an aperture stop, and a hybrid Fresnel lens. The Fresnel lens is disposed at a position along the optical axis of the telecentric illuminator to generate a telecentric image of the aperture stop at an illumination plane. The Fresnel lens may have a curved central portion and the aperture stop may be apodized to achieve desired illumination characteristics and improve the resolution of a mask aligner system.
    Type: Application
    Filed: April 12, 2022
    Publication date: October 20, 2022
    Inventors: Thomas J. Brukilacchio, David W. Pierce
  • CATHETER CONNECTOR SYSTEM
    Publication number: 20080200901
    Abstract: A catheter connector system that allows trimming of the proximal end of a catheter (single or multiple lumen) prior to the placement of a connector hub. In one variation, the catheter connector system comprises a catheter, a connector sheath including a soft collet, and a connector hub including a cannula for engaging the catheter and a connector hub interface for receiving the connector sheath.
    Type: Application
    Filed: April 21, 2008
    Publication date: August 21, 2008
    Applicant: C. R. Bard, Inc.
    Inventors: Kelly Rasmussen, Jeffrey K. Anderson, Jack R. Peterson, David W. Pierce, Scott D. Hinckley, Abraham C. Teng, William R. Barron, Catherine C. Breiter
  • Catheter connector system
    Patent number: 7377915
    Abstract: A catheter connector system that allows trimming of the proximal end of a catheter (single or multiple lumen) prior to the placement of a connector hub. In one variation, the catheter connector system comprises a catheter, a connector sheath including a soft collet, and a connector hub including a cannula for engaging the catheter and a connector hub interface for receiving the connector sheath.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: May 27, 2008
    Assignee: C. R. Bard, Inc.
    Inventors: Kelly Rasmussen, Jeffrey K. Anderson, Jack R. Peterson, David W. Pierce, Scott D. Hinckley, Abraham C. Teng, William R. Barron, Catherine C. Breiter