An electronic golf aid system for assisting users with reading greens on golf courses includes a camera that captures images of the user's field of view, and an electronic display device with a display screen that displays captured images. A processor, which communicates with the camera and display device, is programmed to: receive signals from the camera indicative of images of a golf ball and a cup on the green; determine respective locations for the golf ball and cup; determine a perspective view of the topology of the green between the golf ball and cup from the user's point of view; determine, based on the green's topology, a proposed trajectory line from the golf ball's location to the cup's location; and direct the electronic display device to display the proposed trajectory line superimposed on the surface of the green as the green is shown in real-time on the display screen.

An American-style football configured for direct contact with a user's hands. The football includes an inflatable prolate spheroidal shaped bladder, at least first, second, third and fourth cover panels collectively positioned over the bladder, and a lacing coupled to the first and fourth cover panels. The cover panels are formed of a natural leather and include a pebbled texture. Each of the first, second, third and fourth cover panels have an outer surface that defines cover panel outer surface areas. At least one of the cover panels includes a prep gauge portion and a non-prep gauge portion. The prep gauge portion extends over at least 5 percent, and less than 80 percent, of the outer surface area of the at least one of the cover panels. The non-prep gauge portion has a first color and the prep gauge portion has a second color that is darker than the first color.

A light charger charges a plurality of luminescent balls to emit light for use in dim lighting. The charger is a housing subdivided into a hopper section, a transport and light charging section, and a base section. The transport and light charging section includes a transport assembly integrated with a light charging assembly, with the transport assembly configured to receive and transport luminescent balls from the hopper into and through the light charging assembly, which comprises at least one light source. The light source comprises at least one LED and an illuminating light panel interposed between the LED and the luminescent ball when operating. The base section comprises an ejection exit point for the charged luminescent ball to exit the light charging assembly and a sensor for activating the system to eject at least one luminescent ball.

A light charging system charges at least one luminescent object to emit light and includes a housing comprising an openable lid, an interior, and at least one interior wall, wherein the openable lid provides a light proof seal when mated with the at least one interior wall. A light source comprises an illuminating light panel interposed between at least one light source and the interior to illuminate and charge a luminescent object when operating. An electronic housing contains at least one battery and an on/off switch. A/C or D/C power can be used.

An electronic tracking system for assisting a user in determining distances to landmarks and objects in a sporting environment includes a user tracking system for determining the location of a user, a heads up display for displaying information to the user, and a processor operable to communicate with the user tracking system and the heads up display. The heads up display is designed to be worn on the user's head, and to display an image within the user's field of view. The processor is programmed to determine a distance between the user's determined location and an object or a landmark on. This information is displayed via the heads up display as a numeric representation of the determined distance.

A hockey puck is disclosed including an internal signal transmitter enabling instantaneous identification of its position as it moves around. The puck includes two molded subcomponents, which encapsulate the signal transmitter. The signal transmitter includes driver electronics and a number of signal transmitters which together generate and emit an electromagnetic signal. The electromagnetic signal is emitted by a plurality of diodes mounted in light pipes enclosed within cavities in the subcomponents that extend to outer surfaces of the hockey puck components. The puck includes two subcomponents that are attached via complimentary sets of concentrically arranged wedges.

A game of golf deviates from USGA rules by use of a special marker that may be placed anywhere on a golf course, such as in a sand trap. A group of golfers initiate play from a location proximate the special marker. Play thereafter proceeds according to USGA rules until all players are on the putting green. Ball on the putting green are not marked and removed, but left in place where they can interfere with shots made by members of the group. Predetermined special events are associated with a reduction in points that are used to reduce the USGA score.

An electronic golf aid system for assisting users with reading greens on golf courses includes a camera that captures images of the user's field of view, and an electronic display device with a display screen that displays captured images. A processor, which communicates with the camera and display device, is programmed to: receive signals from the camera indicative of images of a golf ball and a cup on the green; determine respective locations for the golf ball and cup; determine a perspective view of the topology of the green between the golf ball and cup from the user's point of view; determine, based on the green's topology, a proposed trajectory line from the golf ball's location to the cup's location; and direct the electronic display device to display the proposed trajectory line superimposed on the surface of the green as the green is shown in real-time on the display screen.

The present invention is directed to a golf ball having multiple indicia for aiding a golfer in positioning the golf ball with the intended ball path. In one embodiment, the golf ball has at least three distinct primary indicia aligned on the golf ball within a quarter of the circumference of the golf ball. The primary indicia includes a first primary indicia which is spaced a first distance from a second primary indicia, and a third primary indicia which is spaced a second distance from the second primary indicia. In an embodiment, the two distances are different. In another embodiment the distances are the same. Other versions have supplemental indicia positioned between the primary indicia and/or can be positioned proximate the first and/or third primary indicia. The supplemental indicia are preferably lighter in color intensity than the primary indicia so that the primary indicia is more readily visible to a golfer when the golfer is ready to putt.

According to one aspect of the invention, there is provided a method for measuring ball spin, the method comprising the steps of: detecting information on a mark appearing in a region corresponding to a ball hit by a user in each of a plurality of images in which the ball is photographed; determining whether it is possible to directly calculate physical quantities related to spin of the ball on the basis of the information on the mark; and when it is determined that it is not possible to directly calculate the physical quantities related to spin of the ball on the basis of the information on the mark, estimating the physical quantities related to spin of the ball on the basis of physical quantities related to at least one of a speed and an angle of the ball or a club hitting the ball.