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Underwater exhaust system and method

Surgery – Respiratory method or device – Draw-type snorkel
Reexamination Certificate

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Underwater-breathing device

Surgery – Respiratory method or device – Draw-type snorkel
Patent

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Vertical co-axial multi-tubular diving snorkel

Surgery – Respiratory method or device – Draw-type snorkel
Patent

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Water intake prevention device for a snorkel

Surgery – Respiratory method or device – Draw-type snorkel
Reexamination Certificate

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Water preventing equipment of a snorkel

Surgery – Respiratory method or device – Draw-type snorkel
Reexamination Certificate

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Water trap for a snorkel

Surgery – Respiratory method or device – Draw-type snorkel
Patent

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Waterproof device for a snorkel

Surgery – Respiratory method or device – Draw-type snorkel
Reexamination Certificate

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Waterproof structure of a respiratory tube

Surgery – Respiratory method or device – Draw-type snorkel
Reexamination Certificate

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Whistle attachment for a snorkel, and snorkel-whistle unit

Surgery – Respiratory method or device – Draw-type snorkel
Patent

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