Patents Represented by Attorney Norton R. Townsley Freilich, Hornbaker & Rosen

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  • Foam ear plug or earpiece utilizing recycled pulverized polyurethane foam
    Patent number: 7985468
    Abstract: An earpiece of flexible foam construction which incorporates recycled pulverized polyurethane foam (RPPF). RPPF constituting 5% to 30% of the improved foam has been found to be useful. The novel and unique nature of RPPF allows for the replacement of a higher cost component with a lower cost component while maintaining or improving physical properties, such as sound attenuation, sound control, comfort and fit.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: July 26, 2011
    Assignee: Sperian Hearing Protection, LLC
    Inventors: Stephen D. Gilder, Jim Tiemens, Larry Sanders