Patents by Inventor Eric John Christopher MacDonald

Eric John Christopher MacDonald 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).

  • Material handling device
    Patent number: 4059195
    Abstract: A container for accepting bulk material from a delivery vehicle and mounted for pivotal movement to a position where the load of bulk material may be transferred, in whole or in part, through a closable opening in said container to another suitable receptacle, so avoiding the necessity of deeply excavated pits or tanker-type vehicles.
    Type: Grant
    Filed: April 22, 1976
    Date of Patent: November 22, 1977
    Assignee: Macawber Engineering Limited
    Inventors: Eric John Christopher MacDonald, Brian Snowdon