Patents by Inventor David Farnworth

David Farnworth 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: 6329095
    Abstract: A removable tab for metal/air cell, particularly miniature zinc/air button cells which have a principal use as hearing aid batteries. The tab covers air holes in the surface of the cell. The tab has a stiff elongated member that has an extended portion which forms a handle for removing the tab from the cell in order to activate the cell. The tab also comprises a resilient material, preferably a polymeric foam. A portion of the resilient material is adhered to at least a portion of one side of the stiff elongated member and another portion of the resilient material is adhered to cover air holes in the cell surface. A polymeric film can be inserted between the foam and cell surface. The resilient material conforms better to the cell surface which can typically have curved, grooved or depressed regions in addition to the air holes. The resilient material provides more uniform adhesion of the tab to the cell surface with releasable pressure sensitive adhesives.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: December 11, 2001
    Assignee: The Gillette Company
    Inventors: David Farnworth, William I. Clark, George I. Tay, Robb K. Siefert
  • Patent number: D512927
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: December 20, 2005
    Assignee: Acme United Corporation
    Inventors: Javier Verdura, Wayne S. Marcus, Peter Michaelian, Stuart David Farnworth
  • Patent number: D515443
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: February 21, 2006
    Assignee: Acme United Corporation
    Inventors: Javier Verdura, Erik J. Moses, Daniel P. Sterling, Jonathan A. Lee, Stuart David Farnworth
  • Patent number: D452473
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: December 25, 2001
    Assignee: The Gillette Company
    Inventors: Peter B. Clarke, Javier Verdura, Frederic Hedouin, Ruthanne Salvatore, Deborah Kerrigan, Chrsitian Roberts, S. David Farnworth
  • Patent number: D531073
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: October 31, 2006
    Assignee: Acme United Corporation
    Inventors: Javier Verdura, Erik J. Moses, Daniel P. Sterling, Jonathan A. Lee, Stuart David Farnworth
  • Patent number: D554548
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: November 6, 2007
    Assignee: Acme United Corporation
    Inventors: Javier Verdura, Peter Michaelian, Stuart David Farnworth
  • Patent number: D560522
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: January 29, 2008
    Assignee: Acme United Corporation
    Inventors: Stuart David Farnworth, James E. McCay
  • Patent number: D571632
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: June 24, 2008
    Assignee: Acme United Corporation
    Inventors: Michael E. Peterson, Stuart David Farnworth
  • Patent number: D572103
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: July 1, 2008
    Assignee: Acme United Corporation
    Inventors: Michael E. Peterson, Stuart David Farnworth
  • Patent number: D574685
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: August 12, 2008
    Assignee: Acme United Corporation
    Inventors: Michael E. Peterson, Stuart David Farnworth
  • Patent number: D576506
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: September 9, 2008
    Assignee: Acme United Corporation
    Inventors: Stuart David Farnworth, Jonathan A. Lee
  • Patent number: D576507
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: September 9, 2008
    Assignee: Acme United Corporation
    Inventors: Stuart David Farnworth, Jonathan A. Lee
  • Patent number: D576508
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: September 9, 2008
    Assignee: Acme United Corporation
    Inventors: Stuart David Farnworth, Jonathan A. Lee
  • Patent number: D432911
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: October 31, 2000
    Assignee: The Gillette Company
    Inventors: Peter B. Clarke, Javier Verdura, Frederic Hedouin, Ruthanne Salvatore, Deborah Kerrigan, Christian Roberts, S. David Farnworth
  • Patent number: D433629
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: November 14, 2000
    Assignee: The Gillette Company
    Inventors: Peter B. Clarke, Javier Verdura, Frederic Hedouin, Ruthanne Salvatore, Deborah Kerrigan, Christian Roberts, S. David Farnworth