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Patent
   D921072
Priority
Nov 22 2017
Filed
May 17 2018
Issued
Jun 01 2021
Expiry
Jun 01 2036
Inventors
Andersson,…
Assg.orig
Assg.curr
Entity
unknown
Referenced by
2
References
8
Maint.:
n/a
The ornamental design for a core drill attachment, as shown and described.

2.1 : Back

2.2 : Front

2.3 : Top

2.4 : Right

2.5 : Bottom

View 2.1 : back view of core drill attachment; 2.2 front view thereof; 2.3 top view thereof; 2.4 right view thereof; 2.5 bottom view thereof.

INVENTORS:

Andersson, Kjell

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
ER5134,
ER9578,
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
20060137889,
20170152711,
20200332843,
D466139, Nov 16 2001 Ehwa Diamond Industrial Co., Ltd. Core drill
D620035, Feb 02 2010 Hole saw extension cylinder tool bit
D644327, Sep 02 2010 Trephine drill
D752662, Aug 09 2013 Hilti Aktiengesellschaft Change module
D831082, Aug 09 2013 Hilti Aktiengesellschaft Change module
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