Construction machines; shaft couplings for machines; safety couplings for machines; couplings for machines; opening and closing mechanisms being machine parts; couplings for agricultural implements being machine parts; couplings, other than for land vehicles; machine tool couplings; machine couplings of metal for hydraulic apparatus; modular couplings for machine tools

Nuts of metal

Bolts of metal; nuts of metal

metal locks and keys therefor

COMPUTER SYSTEMS COMPRISING ADD-ON HARDWARE DEVICES FOR SOFTWARE PROTECTION