Abstract: An extruded corner bracket is provided, the corner bracket comprising a length; a body extending the length; a pair of wings extending the length and extending outward from the body to define, with the body, an outer right angle and a pair of inner right angles, the inner right angles being normal to each other, each inner right angle having a first face and a second face; and a slot within the body and extending the length, the slot for slidably, non-rotatably retaining a nut and for housing a distal end of a bolt, the slot including an elongate opening defined by a distal edge of each first face. A corner bracket assembly, rectangular structures using the corner bracket assembly and a kit are also provided.

Abstract: An extruded corner bracket is provided, the corner bracket comprising a length; a body extending the length; a pair of wings extending the length and extending outward from the body to define, with the body, an outer right angle and a pair of inner right angles, the inner right angles being normal to each other, each inner right angle having a first face and a second face; and a slot within the body and extending the length, the slot for slidably, non-rotatably retaining a nut and for housing a distal end of a bolt, the slot including an elongate opening defined by a distal edge of each first face. A corner bracket assembly, rectangular structures using the corner bracket assembly and a kit are also provided.

Abstract: A headband for retaining and positioning an object is adapted to have an active configuration and an alternative passive configuration. In the active configuration, the headband can be made to encircle a user's head such that the object is retained on an exterior surface ready for use. In the passive configuration, the headband can be made to close around the object such that the object is retained on an interior surface, protected against damage, with the headband retained in a compact form. In this passive configuration, the headband can releasably engage a belt so as to form a holster for the object, thereby rendering both the object and the headband ready for rapid deployment.

Abstract: This invention pertains to a novel reverse thread carpule dental safety syringe which is useful to dentists in freezing the gums of their patients prior to performing dental work on the patients' teeth, and subsequently retracting the needle into the carpule. A dental syringe for use with a carpule comprising: (a) a hollow barrel; (b) a handle and plunger adapted to reciprocate within the barrel, the end of the plunger removed from the handle being adapted to releasably engage with a first end of a carpule; (c) a carpule receiving cavity at one end of the barrel in alignment with the plunger; and (d) an engagement member at the end of the barrel opposite the handle and plunger for releasably engaging a second end of a carpule.