Patents by Inventor Gregory Hatfield

Gregory Hatfield 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: 4770187
    Abstract: An apparatus for surgical aspiration and monitoring of the aspirated fluids includes a sealable aspiration bottle supported by an electronic weighing scale on a base stand. The bottle includes tubing connectors joined to a negative gauge pressure source and to an aspirating surgical instrument. A pair of electrodes extend into the bottle and are connected to an electronic circuit which measures the impedance of the fluid/tissue aspirate in the bottle. A microprocessor receives the impedance and net weight data of the aspirate, determines the relative amounts and net weights of fluid and tissue in the aspirate, and displays this information on a visual display.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: September 13, 1988
    Assignee: MD Engineering
    Inventors: Robert Lash, Gregory Hatfield
  • Patent number: 4662873
    Abstract: A bracelet adapted to secure an intravenous tube to the wrist of a medical patient is formed of a single elongated strip of flexible plastic material. One end of the strip tapers to a rounded point, with a plurality of ratchet teeth formed in the edges of the strip adjacent to the tapered portion. The opposite end is provided with an opening to receive the first end and to engage the ratchet teeth and form a loop of adjustable length, with a pair of lateral slots provided to retain the distal portion of the first end flush with the bracelet. The medial portion of the strip includes a plurality of pairs of longitudinally extending slots, each pair adapted to receive the intravenous tube therethrough, so that the tube may be secured by describing a retrocurved configuration through the bracelet slots.
    Type: Grant
    Filed: September 3, 1985
    Date of Patent: May 5, 1987
    Assignee: M.D. Engineering
    Inventors: Robert Lash, Gregory Hatfield