Patents by Inventor David D. Webster

David D. Webster 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).

  • SLEEVE CUTTER
    Publication number: 20080089751
    Abstract: A sleeve cutter is provided for precision cutting of a length of metal tubing or the like. The sleeve cutter includes a mandrel or spindle for supporting a tube-shaped sleeve thereon between a pair of rotary-driven cutting wheels adapted for movement together between retracted positions spaced outwardly from the mandrel, and advanced position with cutting edges in engagement with the mandrel-supported sleeve. Each cutting wheel further includes a shaping step or land for removing any burr or flare from the cut sleeve end.
    Type: Application
    Filed: October 5, 2007
    Publication date: April 17, 2008
    Applicant: PHYSICAL SYSTEMS, INC.
    Inventors: Charles G. Hutter, David D. Webster
  • Analytical test apparatus with on board negative and positive control
    Patent number: 5356782
    Abstract: The invention is an apparatus useful in carrying out an analytical assay. The apparatus has a positive and negative control, as well as a site for determining the presence, amount, or lack of an analyte in a sample.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: October 18, 1994
    Assignee: Boehringer Mannheim Corporation
    Inventors: David R. Moorman, David J. Ledden, David D. Webster, Brian A. Heald