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Patent
D801534
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Priority
Dec 11 2015
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Filed
Jun 10 2016
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Issued
Oct 31 2017
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Expiry
Oct 31 2032
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Assg.orig
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Entity
unknown
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1
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20
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n/a
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The ornamental design for an optical trial frame, as shown and described.
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FIG. 1 is a front plan view of an optical trial frame embodying our new design;
FIG. 2 is a side elevational view thereof;
FIG. 3 is a rear plan view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a front perspective view thereof; and,
FIG. 6 is a rear perspective view thereof.
In a preferred embodiment, the nature of this product is an optical trial frame suitable for retinoscopy or refraction tests on the eye.
Koop, Norbert
Patent |
Priority |
Assignee |
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Jan 06 2017 |
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Apr 03 1987 |
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Date |
Maintenance Fee Events |
n/a
Date |
Maintenance Schedule |
n/a