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Stereophone or similar article
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Patent number D301145
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Issue date May 16, 1989
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Koss Corporation
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Joseph C. Besasie
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D14 - Recording, communication, or information retrieval equipment
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Portable stereophone
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Patent number 4,517,418
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Issue date May 14, 1985
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Koss Corporation
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Michael S. Baran
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Collapsible stereophone
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Patent number 4,404,434
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Issue date Sep 13, 1983
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Koss Corporation
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Thomas E. Pelt
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Stereo headphone
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Patent number D265557
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Issue date Jul 27, 1982
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Koss Corporation
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Joseph C. Besasie
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D14 - Recording, communication, or information retrieval equipment
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Headphone
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Patent number D255352
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Issue date Jun 10, 1980
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Koss Corporation
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Joseph C. Besasie
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D14 - Recording, communication, or information retrieval equipment
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Headphone
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Patent number D244300
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Issue date May 10, 1977
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Koss Corporation
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Joseph C. Besasie
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D14 - Recording, communication, or information retrieval equipment
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Headphone earpiece
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Patent number D244301
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Issue date May 10, 1977
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Koss Corporation
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Joseph C. Besasie
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D14 - Recording, communication, or information retrieval equipment
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Headphone earpiece
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Patent number D244213
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Issue date May 3, 1977
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Koss Corporation
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Joseph C. Besasie
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D14 - Recording, communication, or information retrieval equipment