Patents Represented by Attorney Jack Schumna

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  • Ear protecting device
    Patent number: 4459707
    Abstract: An ear protecting device for protecting a wearer from annoying and/or damaging noise levels. The device is comprised of a connecting member and a pair of muffs suitable for covering a wearer's ears. The muffs are suspended from opposite portions of the connecting member. The muffs are permeable to water vapor. Each said muff is at least partially porous. Each said muff has a specific airflow resistance of at least 15,000 SI rayls. Each said muff has a permeance of at least 2 metric perms.
    Type: Grant
    Filed: August 23, 1982
    Date of Patent: July 17, 1984
    Assignee: Cabot Corporation
    Inventor: John P. Stallings