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The ornamental design for a spring screw, as shown and described. |
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FIG. 1 is a perspective front and top view showing our new design;
FIG. 2 is a left side view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
Merilainen, Heikki, Ropponen, Matti
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| May 27 1996 | ROPPONEN, MATTI | Fibox Oy AB | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 008093 | /0095 | |
| May 27 1996 | MERILAINEN, HEIKKI | Fibox Oy AB | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 008093 | /0095 | |
| May 31 1996 | Fibox Oy AB | (assignment on the face of the patent) | / |
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