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United States Utility Patents
6,612,540 - 6,612,549

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NumberTitle
6,612,540 Retrofit for mechanical combination plumbing fixture
6,612,541 Control valve retrofit for pneumatic plumbing fixture
6,612,542 Motor operated butterfly valve
6,612,543 Fluid valve
6,612,544 Electromagnetic valve
6,612,545 Screw on connector
6,612,546 Gate valve with delayed retraction of counter plate
6,612,547 Downhole flow control devices
6,612,548 Hoist
6,612,549 Hoist apparatus



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