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US3538938A
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Automatic sealant sealed valves
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US3428297A
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Stem construction for rising-stem gate valves
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CA632399A
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Automatic lubricant sealed gate valve
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CA526447A
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Automatic sealing gate valve
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CA588931A
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Stem and stuffing box construction for non-rising stem gate valves
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CA654078A
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Gate valve construction
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CA498750A
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Automatic lubricated plug valve
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CA742578A
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Automatic plastic-sealed valve
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CA821398A
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Automatic sealant sealed valve
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CA735749A
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Automatic plastic-sealed valve with two-stage sealing
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CA562243A
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Automatic sealing gate valve
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CA650277A
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Automatic lubricated gate valve
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CA739831A
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Automatic plastic sealed gate valve
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CA575105A
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Swing gate valve
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CA650278A
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Automatic lubricated gate valve
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CA342728A
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Razor blade sharpener
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CA878344A
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Stem construction for rising stem-gate valve
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CA540143A
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Quick sealing automatic sealing gate valve
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CA671699A
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Automatic sealed gate valve
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CA606067A
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Manifold swing gate valve with automatic lubricant sealing
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