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The ornamental design for a pipelayer, substantially as shown. |
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FIG. 1 is a right side elevational view of a pipelayer showing our new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a top plan view thereof; and
FIG. 6 is a bottom plan view thereof.
Allen, Jan K., Hess, Phillip W.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jul 16 1979 | Caterpillar Tractor Co. | (assignment on the face of the patent) | / | |||
| May 15 1986 | CATERPILLAR TRACTOR CO , A CORP OF CALIF | CATERPILLAR INC , A CORP OF DE | ASSIGNMENT OF ASSIGNORS INTEREST | 004669 | /0905 |
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