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James D. Cumming

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Grouted rock bolt

F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent

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Resin-bonded expansion shell

F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent

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Rock bolting assembly

F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent

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Snowshoe

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Patent

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Bearing members for rock bolts

F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent

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Expansion shell for rock bolts

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Patent

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Friction grip fasteners

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Patent

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Grinding mill

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Patent

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Grouted rock bolt

F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent

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Profile ID: LFCA-PAI-P-472332

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