Patents by Inventor John Sidney Lindfield

John Sidney Lindfield 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).

  • Safety device
    Patent number: 6607054
    Abstract: There is provided a sealing device with a support portion and a sealing member. The support portion has a cover plate and a peripheral wall. In the center of the support portion is a central boss which is provided with a blind hole. The boss also has an arm which can be rotated about the boss due to a retaining plate. The blind hole in the boss can be used for receiving stems of various equipment, such as bars, railings, or ladders.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: August 19, 2003
    Assignee: Rota Limited
    Inventor: John Sidney Lindfield