Patents by Inventor Douglas Field

Douglas Field 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: 6302230
    Abstract: An automatically balancing vehicle having a headroom monitor. The headroom monitor determines the difference between the maximum velocity of the vehicle and the present velocity of the vehicle. An alarm receives a signal from the headroom monitor and produces a warning when the headroom falls below a specified limit.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: October 16, 2001
    Assignee: DEKA Products Limited Partnership
    Inventors: Dean L. Kamen, Robert R. Ambrogi, Robert J. Duggan, J. Douglas Field, Richard Kurt Heinzmann, Burl Amesbury, Christopher C. Langenfeld
  • Patent number: 6048485
    Abstract: A process for forming a catheter tip is described wherein a mold having an internal surface complimentary to the desired external surface of the catheter tip is formed such that it has two temperature zones. A first higher temperature zone is positioned proximally of the catheter distal tip and a lower temperature zone is positioned distal to the higher temperature zone. A catheter to be tipped is placed upon a mandrel or needle and the mold is heated. Upon insertion of the catheter and mandrel into the mold. The catheter material softens and begins to flow within the mold. The higher temperature portion supplies the heat necessary to soften the catheter material and it flow to the lower temperature zone wherein the lower temperature causes the catheter material to become more viscous or resolidify. Upon becoming more viscous, the catheter material, at the very tip, acts as a dam to prevent further flow of material thus eliminating flash from the mold end.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: April 11, 2000
    Assignee: Johnson & Johnson Medical, Inc.
    Inventors: J. Douglas Field, Roger Ahlstrom
  • Patent number: 4895134
    Abstract: An ash collector for the collection of ashes from a kettle-type grill. The ash collector is inverted, is frustoconical with a large top opening, and it tapers down to a smaller bottom opening. It has a large horizontal slot about half the width of the ash collector and a small slot opposite the larger slot. It has a non-combustible disk slidable in the large slot, and the disk effectively closes the bottom opening, when the disk is inserted fully into the large slot. The disk has a locking tab for engagement with the small slot to hold the disk horizontally in place and to close off completely the bottom opening. Preferably the ash collector is used with a supporting assembly and a kettle-type grill resting on the supporting assembly. The assembly has legs to which the collector is secured, so that when ashes fall through vent holes at the bottom of the kettle-like grill, the ashes fall into the conical ash collector and onto the disk.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: January 23, 1990
    Assignee: Charcoal Companion
    Inventors: Douglas Fielding, Charles S. Adams
  • Patent number: 4706405
    Abstract: An elongated fishing lure which has generally flat and parallel sides through most of its length and which includes a through bore extending longitudinally through its length to accommodate a fishing line or leader freely therein.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: November 17, 1987
    Inventor: Douglas Field
  • Patent number: D296861
    Type: Grant
    Filed: August 7, 1986
    Date of Patent: July 26, 1988
    Inventors: Douglas Fielding, Charles Adams