Abstract: A construction laser level including a housing, a laser mount disposed in the housing and at least one laser generator on the laser mount. The laser mount includes a plurality of heat dissipating fins.

Abstract: A construction laser level includes a housing and a gimbal assembly disposed in the housing. The gimbal assembly includes a first laser generator operable to generate a first output beam. The first output beam projects outside of the housing onto a target surface. The gimbal assembly includes a second laser generator operable to generate a second output beam. The second output beam projects outside of the housing onto the target surface. The first output beam projects as a first line on the target surface. The second output beam projects as a second line on the target surface. The first line is generally perpendicular to the second line. A wavelength of the first output beam is in the range of 540 to 575 nanometers.

Abstract: A back brace comprising: a pelvic member configured to be secured to a user such that said pelvic member is essentially immobilized relative to the pelvis of said user; a thoracic member configured to around the user such that said thoracic member is essentially immobilized relative to the thorax of said user; and one or more compliant connectors between said pelvic member and said thoracic member and configured to provide a resistive force between said pelvic member and said at least one thoracic member.