Claims (1)
Claim 1 (Independent)
The ornamental design for a concave head thumb screw, as shown and described.
Full Description
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FIG. 1 is a top perspective view of a concave head thumb screw.
FIG. 2 is a bottom perspective view of the concave head thumb screw of FIG. 1 .
FIG. 3 is a side elevation view of the concave head thumb screw of FIG. 1 .
FIG. 4 is a bottom plan view of the concave head thumb screw of FIG. 1 ; and,
FIG. 5 is a top plan view of the concave head thumb screw of FIG. 1 .
Citations
This patent cites (41)
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