Patents by Inventor David Ryvin

David Ryvin 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: 5575009
    Abstract: A cold weather face mask and hood combination is characterized by an elastic support strap which is releasably secured to at least one side of the mask and is trained through a retainer loop on the back of the hood so that the fit of the mask on the wearer's face may be adjusted to increase or decrease the snugness and to accommodate a range of sizes and shapes of facial features in the nose, mouth and chin area. The retainer loop holds the support strap in a selected position along the back of the hood to prevent the loop from slipping to the wearer's shoulders. The face mask has a nose-to-chin protecting pocket with a somewhat parabolic curvature to accommodate a range of sizes and shapes of facial features.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: November 19, 1996
    Assignee: American Allsafe Company
    Inventor: David Ryvin