Patents by Inventor Clifford Duff

Clifford Duff 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).

  • Pneumatic non-locking low-profile telescoping masts
    Patent number: 9520642
    Abstract: A telescoping mast assembly having a mast axis and comprising a plurality of telescoping mast sections having axially opposite ends and being axially slidable relative to one another along the mast axis between retracted and extended positions, the telescoping mast sections including a base tube adapted to be fixed to a support surface and an innermost telescoping section, and wherein the innermost telescoping section supports a cylindrical nest lock platform assembly adapted to cover an axial end of the base tube when the mast assembly is in the retracted position, wherein each telescoping mast section includes an internal collar and a cylindrical body and the nest lock platform assembly includes a payload platform and one or more wedges that mate with corresponding notches in the internal collar.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: December 13, 2016
    Assignee: The Will-Burt Company
    Inventors: Paul Bradford Blackwelder, Cameron Jay Young, Clifford Duff
  • PNEUMATIC NON-LOCKING LOW-PROFILE TELESCOPING MASTS
    Publication number: 20160301128
    Abstract: A telescoping mast assembly having a mast axis and comprising a plurality of telescoping mast sections having axially opposite ends and being axially slidable relative to one another along the mast axis between retracted and extended positions, the telescoping mast sections including a base tube adapted to be fixed to a support surface and an innermost telescoping section, and wherein the innermost telescoping section supports a cylindrical nest lock platform assembly adapted to cover an axial end of the base tube when the mast assembly is in the retracted position, wherein each telescoping mast section includes an internal collar and a cylindrical body and the nest lock platform assembly includes a payload platform and one or more wedges that mate with corresponding notches in the internal collar.
    Type: Application
    Filed: April 8, 2016
    Publication date: October 13, 2016
    Applicant: The Will-Burt Company
    Inventors: Paul Bradford Blackwelder, Cameron Jay Young, Clifford Duff
  • Display housing for a remote visual inspection device
    Patent number: D573042
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: July 15, 2008
    Assignee: Emerson Electric Co.
    Inventors: Jay P. Gatz, Scott Aiello, Timothy Montbach, Clifford Duff, Larry Babb
  • Display housing for a remote visual inspection device
    Patent number: D573903
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: July 29, 2008
    Assignee: Emerson Electric Co.
    Inventors: Jay P. Gatz, Scott Aiello, Timothy Montbach, Clifford Duff, Larry Babb
  • Display housing for a remote visual inspection device
    Patent number: D578906
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: October 21, 2008
    Assignee: Emerson Electric Co.
    Inventors: Jay P. Gatz, Scott Aiello, Timothy Montbach, Clifford Duff, Larry Babb
  • Hand held drain cleaning apparatus
    Patent number: D582108
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: December 2, 2008
    Assignee: Emerson Electric Co.
    Inventors: Clifford Duff, Jon R. Dunkin, Larry Babb
  • Multi-sided light emitting diode display
    Patent number: D677827
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: March 12, 2013
    Inventor: Clifford Duff