Patent
   D981900
Priority
Jun 18 2020
Filed
Jun 18 2020
Issued
Mar 28 2023
Expiry
Mar 28 2038
Assg.orig
Entity
unknown
0
5
n/a
The ornamental design for screw back, as shown and described.

FIG. 1 is a perspective view of screw back showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a bottom plan view thereof.

Deng, Runtao

Patent Priority Assignee Title
Patent Priority Assignee Title
2882702,
D278987, Apr 22 1983 William Findings Corporation Earring nut
D281149, Dec 14 1982 Clenod A/S Earring
D359706, Mar 15 1994 Earring clamp
D363683, May 31 1994 Pin back for earring
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