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			 The ornamental design for a double-ended dual blade utility knife, as shown and described.  | 
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FIG. 1 is a top perspective view of my new design for a doubled-ended utility knife.
FIG. 2 is a bottom perspective view of my new design.
FIG. 3 is a top plan view of my new design.
FIG. 4 is a bottom plan view of my new design.
FIG. 5 is a right side-elevational view of my new design.
FIG. 6 is a left side-elevational view of my new design.
FIG. 7 is a first end elevational view of my new design; and,
FIG. 8 is a second end elevational view of my new design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Aug 01 1999 | BEYERS, GREGORY L | GLB Tool, LLC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 010171 | /0367 | |
| Aug 13 1999 | Gregory L., Beyers | (assignment on the face of the patent) | / | |||
| Mar 28 2000 | GLB Tool, LLC | BEYERS, GREGORY L | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 010746 | /0400 | |
| Feb 14 2005 | BEYERS, GREGORY L | GLB TOOL, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 015740 | /0950 | 
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