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The ornamental design for a cooling pipe return elbow in a steel making furnace, as shown and described.
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The broken lines shown represent environment of the article and form no part of the claimed design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Dec 01 2017 | MANASEK, RICHARD J | AMERIFAB, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 044723 | /0754 | |
| Dec 06 2017 | AmeriFab, Inc. | (assignment on the face of the patent) | / |
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