Patents by Inventor Norman A. Rosenfield

Norman A. Rosenfield 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).

  • Mainsail furling mast assembly and mast construction therefor
    Patent number: 4480570
    Abstract: A mainsail furling mast assembly utilizes a mast having a cross section providing a C-shaped outer wall and a transverse wall defining a rearwardly opening compartment in which is disposed a furling element about which the mainsail may be furled. The opening in the mast has a width equal to at least 50 percent of the maximum width of the mast to provide facile access to the compartment. The mast has a boom mounting bracket including a reinforcement portion with a section which extends within the compartment and flange sections which extend forwardly about the outer wall.
    Type: Grant
    Filed: October 5, 1982
    Date of Patent: November 6, 1984
    Assignee: Metalmast Marine, Inc.
    Inventors: Norman A. Rosenfield, Paul M. Rosenfield, Robert H. Jones