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Patent
D921927
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Priority
Dec 05 2019
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Filed
Dec 05 2019
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Issued
Jun 08 2021
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Expiry
Jun 08 2036
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Assg.orig
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Entity
unknown
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The ornamental design for a step tread frame, as shown and described.
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FIG. 1 is a perspective view of a step tread frame in an exemplary application;
FIG. 2 is a front perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is a left side view thereof; and,
FIG. 9 is a rear perspective view thereof.
The broken lines in FIG. 1 depict environmental subject matter and form no part of the claimed design.
Fuller, Nathaniel, McKinnon, Scott C.
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