Patents by Inventor David Broad

David Broad 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).

  • Container closure
    Patent number: 4380302
    Abstract: The cap of a centrifuge sample tube has a larger than usual bore therethrough to facilitate sample loading and unloading. Sealing of the larger bored is better than seals which can be achieved with the very narrow bores hitherto considered essential to minimize potential sources of leakage of sample from the tube.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: April 19, 1983
    Assignee: Fisons Limited
    Inventor: David Broad