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Robertson; Cecil C.
Fort Worth, TX
No. of patents:

Patent Number Title Of Patent Date Issued
4080988 Combination employing controlled flow check valve March 28, 1978
In a combination including a communications conduit containing pressurized fluid and a smaller conduit sealingly connected therewith for testing the pressure of the fluid therewithin, an improvement characterized by a controlled flow check valve connected serially with the smaller condui

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