Patents by Inventor David Graham Silvester

David Graham Silvester 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).

  • Disabling device
    Patent number: 5794462
    Abstract: A disabling device comprises a U member (12) having a U-shaped cross section defining a base of the U and two limbs (21, 22). Each limb has an aperture (23, 24), the two apertures being opposite each other. A pin (11) has a stem (32) and a head (31), the stem being sized to engage in the apertures (23, 24) and to extend between the limbs while engaged in the apertures. A lock (14) locks the pin to the U member, whereby the device cannot be removed from the apparatus being disabled.
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: August 18, 1998
    Assignee: Trailer Lock Development Limited
    Inventors: Duncan Andrew Steele, David Graham Silvester