Material or article handling – Cylindrical bar handling device – Vertical cylindrical bar
Reexamination Certificate
2004-01-30
2008-08-19
Underwood, Donald (Department: 3652)
Material or article handling
Cylindrical bar handling device
Vertical cylindrical bar
C081S057340, C414S745200
Reexamination Certificate
active
07413398
ABSTRACT:
A power tong positioning apparatus having a base section and a backup elevating section engaging the base section. A first lift assembly is positioned between the base section and the backup elevating section while a tong elevating section engages the backup elevating section. A second lift assembly is then positioned between the backup elevating section and the tong elevating section.
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Bangert Daniel S.
Musemeche Clint Michael
Jones, Walker, Waechter, Poitevent, Carrere, & Denegre, L.L
McCoy Corporation
Underwood Donald
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