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The ornamental design for a check valve, substantially as shown. |
FIG. 1 is a perspective view taken from the front and right side of a check valve, showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a bottom plan view thereof; and
FIG. 6 is a sectional view taken along line 6--6 of FIG. 4.
Willinger, Allan H., Itakura, Tsuyoshi
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Jul 13 1993 | WILLINGER, ALLAN H | WILLINGER BROS , INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 006624 | /0602 |
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