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The ornamental design for envelope opener, as shown and described. |
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FIG. 1 is a top perspective view of an envelope opener, showing my new design;
FIG. 2 is a top plan view;
FIG. 3 is a bottom plan view;
FIG. 4 is a left side elevational view;
FIG. 5 is a right side elevational view;
FIG. 6 is a front elevational view; and
FIG. 7 is a rear elevational view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| May 25 1988 | Elm Industry Co., Ltd. | (assignment on the face of the patent) | / | |||
| Jul 20 1988 | TANIGAMI, SHINTARO | ELM INDUSTRY CO , LTD , A CORP OF JAPAN | ASSIGNMENT OF ASSIGNORS INTEREST | 004924 | /0672 |
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