Abstract: A method for practicing a golf swing wherein a laser swing aid is used for defining a swing path for a club head and for aligning a club head of a golf club with a ball along a target path. The swing aid includes a body containing a power source coupled to a laser source coupled to an optics system. The optics system is arranged to produce a light beam in a plane. The body of the swing aid is positioned a distance apart from and separate from the club head and ball. The plane of the beam formed by the swing aid is positioned to produce a line of light aligned with the target path, the club head, and the ball. The line of light is formed and positioned to be visible across the club head and the ball along the target path and throughout at least a portion of a desired swing path.

Abstract: A detachable training system for golf clubs includes a golf club head having a top portion and a face portion. The system includes a removable training device with a base, the base formed to fit in a receiver on the club head. The system also includes a first removable plate formed to fit in the receiver on the club head when the removable training device is removed. In use, the removable training device is installed on the club during practice and is removed during actual golf rounds. The removable plate is installed on the club during golf rounds to provide similar weight, use and feel of the club head so the golfer can accurately replicate the strokes perfected during practice.

Abstract: A method and system for determining the authenticity of an item such as an original work of art, an art print, valuable jewelry or other valuable items utilizes images of one or more unique patterns of features, preferably at a microscopic level, as one or more "signatures" of the item. The image of this unique signature is recorded and stored electronically as data representing the unique pattern. The data are registered with identifying text and stored in a secure storage location, to prevent unauthorized duplication or use of the stored data. Following this registration and storage, an item presented as authentic can be examined microscopically at prescribed sites on the item where the original images were taken. Comparison is made at one or more of the sites, and a decision is made as to whether the item exhibits substantially identical features to those originally registered, so as to be the same authentic item. Comparison can be made electronically or visually/microscopically.

Abstract: A method and system for determining the authenticity of an item such as an original work of art, an art print, valuable jewelry or other valuable items utilizes images of one or more unique patterns of features, preferably at a microscopic level, as one or more "signatures" of the item. The image of this unique signature is recorded and stored electronically as data representing the unique pattern. The data are registered with identifying text and stored in a secure storage location, to prevent unauthorized duplication or use of the stored data. Following this registration and storage, an item presented as authentic can be examined microscopically at prescribed sites on the item where the original images were taken. Comparison is made at one or more of the sites, and a decision is made as to whether the item exhibits substantially identical features to those originally registered, so as to be the same authentic item. Comparison can be made electronically or visually/microscopically.