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The ornamental design for an underwater drainage device with dual collection chambers, as shown and described. |
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FIG. 1 is a front elevational view of an underwater drainage device showing the new design;
FIG. 2 is a top plan view of FIG. 1;
FIG. 3 is a rear elevational view of the underwater drainage device shown in FIG. 1;
FIG. 4 is a bottom plan view of FIG. 1;
FIG. 5 is an end elevational view of the right hand end of the device shown in FIG. 1;
FIG. 6 is a left end elevational view of the device shown in FIG. 1; and
FIG. 7 is a top perspective view of the underwater drainage device shown in FIG. 1.
Kurtz, Leonard D., Bidwell, Robert E.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Apr 07 1976 | Deknatel, Inc. | (assignment on the face of the patent) | / | |||
| Jun 24 1984 | HOWMEDICA, INC | PFIZER HOSPITAL PRODUCTS GROUP INC | CHANGE OF NAME SEE DOCUMENT FOR DETAILS | 004471 | /0589 |
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