Patents by Inventor James Graeme Dalrymple

James Graeme Dalrymple 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).

  • Train traction device and methods
    Publication number: 20030197386
    Abstract: Particles, devices and methods of increasing rail road train traction and reducing wheel/track noise. The invention provides hard metal particles which can be embedded into a rail head to minimize slippage for improved locomotive traction and reduced oscillations of train wheels which cause noise and track wear.
    Type: Application
    Filed: April 15, 2002
    Publication date: October 23, 2003
    Inventor: James Graeme Dalrymple