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Sound-modulating device
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Patent number 9,986,335
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Issue date May 29, 2018
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YI SHENG CO., LTD.
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Jen-Fang Yu
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Silencer
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Patent number 5,093,864
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Issue date Mar 3, 1992
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Kabushiki Kaisha Toshiba
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Yasuyuki Sekiguchi
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Silencer
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Patent number 5,052,041
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Issue date Sep 24, 1991
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Kabushiki Kaisha Toshiba
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Keiji Nakanishi
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Silencer
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Patent number 4,989,252
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Issue date Jan 29, 1991
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Kabushiki Kaisha Toshiba
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Keiji Nakanishi
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...