Abstract: A utility corner shelf bracket which enables easy installation and removal, which are done quickly and without requiring tools, of a utility corner shelf bracket, and placing a shelf upon it, and which it based on bows which are capable of bending on one plane and durable to loads perpendicular to this plane and a tensioning system which enables adjustment to the wall corner prior to installation and fastening to the wall during installation.

Abstract: A utility corner shelf bracket which enables easy installation and removal, which are done quickly and without requiring tools, of a utility corner shelf bracket, and placing a shelf upon it, and which it based on bows which are capable of bending on one plane and durable to loads perpendicular to this plane and a tensioning system which enables adjustment to the wall corner prior to installation and fastening to the wall during installation.

Abstract: A utility corner shelf bracket which enables easy installation and removal, which are done quickly and without requiring tools, of a utility corner shelf bracket, and placing a shelf upon it, and which it based on bows which are capable of bending on one plane and durable to loads perpendicular to this plane and a tensioning system which enables adjustment to the wall corner prior to installation and fastening to the wall during installation.

Abstract: An electronic device that can be mounted onto almost any type of key, for indicating the lock/unlocked status of the lock operable by the key. The electronic device includes a processing unit that when rotational torque force being applied on the key, the processing unit identifies depressed contact sensors, and determines whether the lock was last rotated clockwise (typically locking direction) or counterclockwise (typically unlocking direction). Data representing the rotation direction is stored in the memory. When a designated switch is operated, the electronic device activates an indication that indicates whether the lock is in a lock state or in an unlocked state, according to the data stored in the memory.