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The ornamental design for a heat exchanger, as shown and described. |
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FIG. 1 is a front elevational view of a heat exchanger, showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a sectional view taken along line 7--7 of FIG. 1.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jul 05 1982 | FUKUMOTO, MASAFUMI | NISSHIN CHEMICAL INDUSTRY CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST | 004028 | /0341 | |
| Jul 29 1982 | Nisshin Chemical Industry Co., Ltd. | (assignment on the face of the patent) | / |
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