Patents by Inventor John B. Blackwell

John B. Blackwell 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).

  • Patent number: 4637625
    Abstract: A lawn mower hitch assembly including a leading hitch device and a trailing hitch device secured to a respective leading mower vehicle and a trailing mower vehicle, and operatively connected to each other for free pivotal movement about a substantially vertical axis, whereby one or more lawn mower vehicles can be towed in tandem and in offset lateral relationship by a leading tractor vehicle.
    Type: Grant
    Filed: June 20, 1985
    Date of Patent: January 20, 1987
    Inventor: John B. Blackwell