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DAVIS CALYX DRILL Co
DAVIS CALY
Active Patents
0
Total Holdings
2
Patent Holdings
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Patent No.
Title
Status
Filing Date
Grant Date
Claims
Actions
US790331A
Core-drill apparatus.
Expired / Lapsed
1904-08-25
1905-05-23
0
Details
US790330A
Core-drill.
Expired / Lapsed
1904-06-10
1905-05-23
0
Details