Patent
   D858631
Priority
Mar 27 2018
Filed
Sep 27 2018
Issued
Sep 03 2019
Expiry
Sep 03 2034
Assg.orig
Entity
unknown
1
14
n/a
The ornamental design for a demonstration tool, as shown and described.

FIG. 1 is a front perspective view of a demonstration tool, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right-side elevation view thereof;

FIG. 6 is a left-side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

Ye, Seo Ji

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Executed onAssignorAssigneeConveyanceFrameReelDoc
Sep 14 2018YE, SEO JIVIEWITECH CO , LTD ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0470650731 pdf
Sep 14 2018VIEWITECH CO , LTD Carl Zeiss VIsion International GmbHASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0470890240 pdf
Sep 27 2018Carl Zeiss VIsion International GmbH(assignment on the face of the patent)
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