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Patent
D820479
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Priority
Jun 05 2017
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Filed
Jun 05 2017
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Issued
Jun 12 2018
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Expiry
Jun 12 2033
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Assg.orig
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Entity
unknown
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4
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The ornamental design for light bulb filament, as shown and described.
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FIG. 1 is a perspective front View of light bulb filament;
FIG. 2 is a front View thereof;
FIG. 3 is a left side View thereof;
FIG. 4 is a rear View thereof;
FIG. 5 is a right side View thereof;
FIG. 6 is a top plan View thereof;
FIG. 7 is a bottom plan View thereof; and,
FIG. 8 is a perspective front View thereof.
Jiang, Hongkui, Gao, Yanzeng, Wu, Feng, Wu, Chenjun
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