PTO
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Patent
D821002
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Priority
Sep 23 2016
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Filed
Mar 16 2017
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Issued
Jun 19 2018
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Expiry
Jun 19 2033
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Assg.orig
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Entity
unknown
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6
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5
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The ornamental design for a bulb filament, as shown and described.
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FIG. 1 is a front view of a bulb filament showing our new design, with the back view being a mirror image thereof;
FIG. 2 is a side view of the bulb filament shown in FIG. 1, with the other side view being a mirror image;
FIG. 3 is a top view of the bulb filament shown in FIG. 1; and,
FIG. 4 is a bottom view of the bulb filament shown in FIG. 1.
The broken lines depicting the glass bulb, base, and portions of the stem show unclaimed subject matter for the design.
Ward, Joshua, Armitage, Joseph, Pleass, James Rhodri
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