Claims (1)
Claim 1 (Independent)
The ornamental design for a lamp base, as shown and described.
Full Description
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FIG. 1 is a side view of the lamp base, with all sides being the same;
FIG. 2 is a top view thereof; and,
FIG. 3 is a bottom view thereof.
The broken lines represent environment of use and form no part of the claim.