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The ornamental design for a double torsion coil spring, as shown and described. |
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FIG. 1 is a perspective view of a double torsion coil spring showing my new design
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a plan/inverted plan view
FIG. 5 is a right side view; and,
FIG. 6 is a left side view.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Mar 24 1998 | GIBBENS, GREGORY RICHARD | GEORGE GIBBENS PTY, LIMITED | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 009188 | /0270 | |
| Mar 27 1998 | George Gibbens Pty., Ltd | (assignment on the face of the patent) | / |
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