Patent
   D847881
Priority
Jan 30 2018
Filed
Jan 30 2018
Issued
May 07 2019
Expiry
May 07 2034
Assg.orig
Entity
unknown
0
10
n/a
The ornamental design for air-operated grinding device, as shown and described.

FIG. 1 is a front view of the air-operated grinding device showing our new design;

FIG. 2 is a back view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is another perspective view thereof.

Guo, Biao, Jia, Yong An

Patent Priority Assignee Title
Patent Priority Assignee Title
10137554, Aug 23 2016 Techway Industrial Co., Ltd. Hand-held belt sander
3611646,
4578906, Nov 08 1983 Seco Engineering Co., Ltd. Grinding tool
4707944, Feb 18 1986 Apparatus for honing a cylinder
D321465, Aug 31 1988 Nitto Kohki Co., Ltd. Portable belt sander
D331585, Jun 06 1990 Grinding instrument
D338901, Jan 02 1992 Grinding machine
D339811, Dec 21 1990 P.A. Products Pty. Ltd. Belt grinding device
D395054, Apr 04 1997 Dainaka Seiki, Inc. Stone grinding and polishing machine
D620509, Jan 27 2009 Airtec AG Mobile grinding machine
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Jan 30 2018NINGBO SANKUI GRINDING MATERIAL CO., LTD.(assignment on the face of the patent)
Dec 01 2018GUO, BIAONINGBO SANKUI GRINDING MATERIAL CO , LTD ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0479060490 pdf
Dec 01 2018JIA, YONG ANNINGBO SANKUI GRINDING MATERIAL CO , LTD ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0479060490 pdf
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