Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B25
HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
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B25B
TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
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B25B13/50
for operating on work of special profile, e.g. pipes
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B25B13/5008
for operating on pipes or cylindrical objects
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B25B13/5016
by externally gripping the pipe
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B25B13/5025
using a pipe wrench type tool
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B25B13/5033
with fixed jaws
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