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Priority to NL6504792ApriorityCriticalpatent/NL6504792A/xx
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E05B35/00—Locks for use with special keys or a plurality of keys ; keys therefor
E05B35/08—Locks for use with special keys or a plurality of keys ; keys therefor operable by a plurality of keys
E05B35/086—Locks for use with special keys or a plurality of keys ; keys therefor operable by a plurality of keys using a pair of interlocked keys, one of the keys being non-removable; key-storing devices from which only one key can be removed at a time