Patents by Inventor Geoffrey Richard Eldridge

Geoffrey Richard Eldridge 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).

  • Tree injection apparatus
    Patent number: 5956894
    Abstract: Apparatus and methods for injecting a fluid into tissue of a plant are described. In one embodiment, the apparatus (1) comprises a spindle (2) which rotates within a fluid delivery manifold (3). The spindle can be driven by an electric drill and the spindle has a threaded portion (4) for insertion into the plant. In another embodiment, the apparatus includes a pump barrel which in conjunction with the spindle allows the apparatus to be used as a syringe. Methods of delivering fluid to plant tissue using apparatus according to the invention are also described.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: September 28, 1999
    Inventor: Geoffrey Richard Eldridge