The lock-and-key binding is specific because it is controlled by how closely the size of a spherical colloidal key particle matches the radius of the spherical cavity of the lock particle.

Representative claim 1 of the ’537 patent relates to a method of making available a dual-access lock having a combination-lock portion and a master-key-lock portion. The dual-access lock ...

Originally called Cavity Lock Systems, Cintec™ International Ltd now provides Turn-Key design and installation of Masonry Anchoring Stabilization systems and Explosion Blast Mitigation ...