Machines not elsewhere specified – Material working – abrading – or founding machinery – Deforming or crushing
Design Patent
2008-04-29
2008-04-29
Davis, Antoine D. (Department: 2915)
Machines not elsewhere specified
Material working, abrading, or founding machinery
Deforming or crushing
Design Patent
active
29228940
CLAIM:
The ornamental design for the refractory block, as shown as described.
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patent: D516734 (2006-03-01), Keys et al.
patent: 2005/0252145 (2005-11-01), MacDonald et al.
Berry John E.
Stephansky John J.
Davis Antoine D.
Harbison-Walker Refractories Company
Kusner & Jaffe
Palasik Patricia
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