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| Number | Title | Issue Date |
| 5979202 | Method and apparatus for making pipe line steel grooved-end fittings A method for making a grooved-end pipe fitting from standard pipe includes the steps of bending length of pipe on a press mandrel to form a curved pipe segment with an oval cross section and further working the curved pipe segment in a die to produce tang... | 11/09/1999 |
| 4391458 | Pipe coupling with gasket locating means A side-outlet pipe coupling having a split housing surrounding split-ring gasket means is provided. Lugs formed at the free ends of the gasket means position said gasket means within the coupling housing such that abutting free ends of the gasket means ar... | 07/05/1983 |
| 4073513 | Pipe branch fitting A pipe branch fitting has a cylindrical body freely slidable along the pipe to a point where a hole is pre-cut in the pipe. On one side, the cylinder carries a screw-threaded tubular insert on which the branch is to be connected. A gasket between the inse... | 02/14/1978 |
