Patents by Inventor Frederick C. Liebertz

Frederick C. Liebertz 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).

  • Knock-down vertical file
    Patent number: 6419333
    Abstract: A knock-down file cabinet and in particular, a vertical file cabinet wherein both the cabinet housing and each of the drawers have a knock-down construction. The drawers use either separate components that are slidably fitted together, or a single sheet of material that defines the bottom, side and back walls. Each drawer construction is usable within the cabinet housing so as to define a complete knock-down vertical file cabinet which can be readily shipped in a relatively, compact container or package and thereafter assembled together.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: July 16, 2002
    Assignee: Haworth, Inc.
    Inventors: Frederick C. Liebertz, Mark A. Powell
  • Knock-down vertical file
    Publication number: 20010050518
    Abstract: A knock-down file cabinet and in particular, a vertical file cabinet wherein both the cabinet housing and each of the drawers have a knock-down construction. The drawers use either separate components that are slidably fitted together, or a single sheet of material that defines the bottom, side and back walls. Each drawer construction is usable within the cabinet housing so as to define a complete knock-down vertical file cabinet which can be readily shipped in a relatively compact container or package and thereafter assembled together.
    Type: Application
    Filed: May 11, 2001
    Publication date: December 13, 2001
    Applicant: Haworth, Inc.
    Inventors: Frederick C. Liebertz, Mark A. Powell
  • Knock-down vertical file
    Patent number: 6231141
    Abstract: A knock-down file cabinet and in particular, a vertical file cabinet wherein both the cabinet housing and each of the drawers have a knock-down construction. The drawers use either separate components that are slidably fitted together, or a single sheet of material that defines the bottom, side and back walls. Each drawer construction is usable within the cabinet housing so as to define a complete knock-down vertical file cabinet which can be readily shipped in a relatively compact container or package and thereafter assembled together.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: May 15, 2001
    Assignee: Haworth, Inc.
    Inventors: Frederick C. Liebertz, Mark A. Powell
  • Knock-down vertical file
    Patent number: 6007170
    Abstract: A knock-down file cabinet and in particular, a vertical file cabinet wherein both the cabinet housing and each of the drawers have a knock-down construction. The drawers use either separate components that are slidably fitted together, or a single sheet of material that defines the bottom, side and back walls. Each drawer construction is usable within the cabinet housing so as to define a complete knock-down vertical file cabinet which can be readily shipped in a relatively compact container or package and thereafter assembled together.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: December 28, 1999
    Assignee: Haworth, Inc.
    Inventors: Frederick C. Liebertz, Mark A. Powell
  • Drawer slide
    Patent number: 5775786
    Abstract: A drawer slide for a drawer-type storage unit allowing a drawer to be horizontally moved from the storage unit to allow access into the interior of the drawer. The drawer slide is vertically symmetrical about a central longitudinal plane perpendicular to the side surfaces of the drawer slide. A cantilevered tongue, loop-like bracket, and latch are vertically symmetrically positioned on a support rail of the drawer slide. The tongue is receivable in a slot in a vertical mounting rail in the storage unit. The bracket is received in an opening of a vertical mounting rail. The latch engages a further slot in a vertical mounting rail to prevent accidental disengagement of the slide rail from the mounting rails. The vertical symmetry of the drawer slide allows the drawer slides to be used on either side of the storage unit with only a front and back orientation.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: July 7, 1998
    Assignee: Haworth, Inc.
    Inventor: Frederick C. Liebertz