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Inventor: Robertson; Cecil C.
Address: Fort Worth, TX
No. of patents: 1
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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