LEVELS COMPRISING FRAME

Brand	Owner	Address	Description
DU.AL VIAL	Johnson Level & Tool Mfg. Co., Inc.	6333 West Donges Bay Road Mequon WI 53092	Levels Comprising a Frame and at Least One Level Vial Assembled Thereto;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A goggle comprising a lens, a frame, a lens-retention mechanism and an adjustment mechanism wherein the lenses can be selectively moved relative to the frame to at least two different positions defining substantially different levels of air flow between the lenses and frame while maintaining the lenses in front of a user's eyes, and retained at each position. In certain,embodiments, one position is defined by substantially all of the lens periphery contacting the frame to substantially form a seal. The adjustment and lens-retention mechanisms may be the same mechanism.