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The ornamental design for a collapsible bollard, as shown and described. |
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FIG. 1 is a front perspective view of a collapsible bollard showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a rear elevational view thereof; and
FIG. 5 is a side elevational view thereof.
Miller, James M., Wargo, James A.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Apr 13 1989 | Trustees of the University of Pennsylvania | (assignment on the face of the patent) | / | |||
| Nov 04 1991 | MILLER, JAMES M | TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA, THE, | ASSIGNMENT OF ASSIGNORS INTEREST | 005921 | /0887 | |
| Nov 04 1991 | WARGO, JAMES A | TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA, THE, | ASSIGNMENT OF ASSIGNORS INTEREST | 005921 | /0887 |
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