Patents by Inventor Wolfgang Dengler

Wolfgang Dengler 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: 6796738
    Abstract: A loop-type binder comprises tongues (4) attached on its back cover for holding document sheets, and these tongues (4) constantly increase in thickness from their base (6) to their tip (9), thus comprising a deflection resistant tip and an elastic staff at their base. The radius of the joining area (15) from the tongue to the base is by several times smaller on the side facing the back cover than the radius of the joining area (14) on the side that faces the front cover. The stopper (13) that retains the tongue when the binder is open is integrated into the tongue by a slope (12). This tongue design facilitates convenient and gentle handling and storage of documents (FIG. 2).
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: September 28, 2004
    Inventor: Wolfgang Dengler
  • Publication number: 20030053848
    Abstract: A loop-type binder comprises tongues (4) attached on its back cover for holding document sheets, and these tongues (4) constantly increase in thickness from their base (6) to their tip (9), thus comprising a deflection resistant tip and an elastic staff at their base. The radius of the joining area (15) from the tongue to the base is by several times smaller on the side facing the back cover than the radius of the joining area (14) on the side that faces the front cover. The stopper (13) that retains the tongue when the binder is open is integrated into the tongue by a slope (12). This tongue design facilitates convenient and gentle handling and storage of documents (FIG. 2).
    Type: Application
    Filed: August 15, 2002
    Publication date: March 20, 2003
    Inventor: Wolfgang Dengler
  • Patent number: 5593184
    Abstract: A one-piece loose-leaf binder cut from a foil-like material. A set of perforations forms a suspension element which is separated from the remainder of the loose-leaf binder and folded back along a fold line, which is parallel to an edge of the loose-leaf binder. The folded suspension element extends beyond each edge of the binder to engage a pair of parallel rails.
    Type: Grant
    Filed: January 3, 1995
    Date of Patent: January 14, 1997
    Assignee: Off Data GmbH
    Inventor: Wolfgang Dengler
  • Patent number: 4302123
    Abstract: Clasp element consisting of a U-shaped retaining bar with beaded edges and connected with a file cover, of two slides, which are mounted slidably to and fro between a suspension setting and a stacking setting, are clippable from above onto the retaining bar and which are bringable into engagement by side webs with the beaded edges of the retaining bar, with hookshaped end sections and longitudinal webs which engage into the U-profile of the retaining bar for the formation of a central groove for flexible filing spikes, the ends of which are pluggable through openings of the retaining bar and in bent-over state lockable by the slides, wherein tongues forming a catching space for the filing spike are provided at the end of the slide pointing towards the middle of the bar, an end strip covering the cross-sectional profile of the retaining bar is provided at the end of the slide lying opposite the tongues, and wherein the central groove displays a ramp in the region of the catching space.
    Type: Grant
    Filed: November 23, 1979
    Date of Patent: November 24, 1981
    Assignee: Wolfgang Dengler
    Inventors: Wolfgang Dengler, Hans Vetter