Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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B21J
FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
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B21J15/28
Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups
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B21J15/285
for controlling the rivet upset cycle
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