Patents by Inventor David North

David North 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: 6386358
    Abstract: The present invention relates to a tablet package that contains a predetermined number of tablet(s) and a predetermined quantity of liquid. The liquid in such tablet package is stored within a reservoir and is seperated from the tablet(s). The tablet(s) in such package is stored within a sealed compartment located in a closure member (e.g. a screw cap), which functions to close the reservoir and retains the liquid within the reservoir prior to use of the tablet package. The sealed compartment for storing the tablet(s) preferably has a breakable sheet through which the tablet(s) can be ejected. More preferably, the container has separating means (e.g. a grill member) located between the breakable sheet and the reservoir to prevent the tablet(s) from entering the liquid.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: May 14, 2002
    Inventors: Richard David North, Peter Thomas Bowdler
  • Patent number: 5884667
    Abstract: A variable flow restricting device comprises a part (12) having a groove (14) provided in a face (18) thereof and a through-passage (20) communicating with the groove. The device further comprises a covering structure (22) for engaging the face (18) to cover the groove (14) and thereby define a flow path which extends from the through-passage (20) in communication therewith. Covering of the groove is facilitated by a structure (26) for providing relative displacement between the part (12) and the covering structure (22) for causing resilient deformation of the covering structure and/or the part (12) to provide adjustably variable covering of the groove. The flow path extends from the through-passage (20) to an extent which is adjustably variable according to relative displacement of the part (12) and the covering structure.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: March 23, 1999
    Assignee: Cistermiser Limited
    Inventor: Alan David North