Abstract: A hybrid wood-type golf club head (20) with a main body (22) and a minor body (24) is disclosed herein. The main body (26) has a front portion (30), a crown portion (25), a partial toe portion (27), a partial heel portion (26), a partial rear portion (28) and a partial sole portion (29). The minor body (24) preferably has a sole wall (31), a partial toe wall (33), a partial heel wall (32) and a partial rear wall (34). The minor body (24) is preferably welded to the main body (22). The minor body (24) preferably has a mass ranging from 80 grams to 130 grams. The minor body (24) is preferably from 55 weight percent to 35 weight percent of the total mass of the wood-type golf club head (20).

Abstract: A fairway wood type golf club head and method for forming is disclosed herein. The golf club head preferably has a cast body, a compression molded crown, and weight pads. The weight pads can be manipulated to create different mass property configurations for the golf club head using the same body and crown.

Abstract: A golf club having a golf club head 20 with a keel zone that makes the actual face angle of the golf club appear differently when the golf club is at address. The golf club head 20 has a keel zone that is preferably 0.5 inch wide in the fore-aft direction and 1.0 inch wide in the heel-toe direction, which changes the appearance of the face angle while the golf club is at address.

Abstract: A club shaft that can be installed in a club head permanently or can be installed in clubs with interchangeable shaft features is disclosed herein. The invention is a measurement device that enables the capturing of the speed and motion of the swing. The invention uses two antennas, one transmitting and one receiving. The power of the radar wave is low. The wavelength will be on the order of a millimeter.

Abstract: An iron-type golf club head having a rear cavity with an undercut portion is disclosed herein. The undercut portion is present in less than 360 degrees of the rear cavity. Further, the undercut portion is preferably discontinuous. Further, the under portion preferably has sharp angles at segments of the rear cavity.

Abstract: A method, system and golf ball are provided to determine the deceleration of a golf ball and, in turn, the speed of a green. The system may include a golf ball and an offboard display device. The golf ball may include a golf ball body, a motion sensor disposed within the golf ball body to measure acceleration of the golf ball along each of three mutually perpendicular axes, and a transmitter disposed within the golf ball body to transmit data representative of deceleration. The display device may include a receiver to receive data representative of the deceleration of the golf ball from transmitter and a display to provide a representation of the deceleration of the golf ball. At least one of the golf ball and the display device may include a processor to determine deceleration of the golf ball based upon the acceleration measured by the motion sensor.

Abstract: An improved range finder for use on a golf course. The improved range finder includes means for identifying the closest target in a field of view during a sweep operation of the field of view and means for presenting the distance of the closest target at the conclusion of the sweep operation of the field of view. The improved range finder preferably uses infrared light to detect a flagstick.

Abstract: A device for tracking a golfer's shot during a round of golf wherein the device comprises a housing, a battery having no more than 225 milliamp hours of power, a microprocessor and an accelerometer. The accelerometer is preferably a multiple axis accelerometer. The circuit is preferably utilized with a device for shot tracking.

Abstract: A hybrid type golf club head is disclosed herein. The hybrid golf club head preferably has an increased heel/toe camber to minimize drag through rough when a golfer swings the hybrid golf club. A sole of the hybrid golf club head is relieved to allow for the face angle to open without the leading edge lifting too high.

Abstract: A hybrid type golf club head is disclosed herein. The hybrid golf club head preferably has an exterior heel weight, an exterior toe weight, and interior sole weight and a stainless steel body. The hybrid golf club head preferably has a moment of inertia Ixx about a center of gravity ranging from 2100 to 2300 grams-centimeters squared.

Abstract: An iron-type golf club head is disclosed herein. The iron-type golf club head has multiple movable mass members which allow for the center of gravity to be moved at least 0.170 inch in a feel to toe direction and 0.070 inch in a crown to sole direction. Each of the movable mass members is preferably composed of a material having a density ranging from 12 g/cm3 and 14 g/cm3.

Abstract: A golf club including a club head and an interchangeable shaft is disclosed herein. A connection assembly (44) comprises a sleeve insert (47), a hosel sleeve (48), a hosel tube (46), a ring mechanism (48) and a guide ring (49).

Abstract: The present invention provides a method of manufacture and design such that very small detail features can be produced within the groove profile on an iron or wedge. The advantage in being able to do this is that spin will be enhanced for a variety of shot types and conditions when striking a golf ball with cover composed of a urethane-based material.

Abstract: The present invention relates to shot tracking. More specifically, the present invention relates to a method and system for tracking shots of a golfer during a round of golf. One aspect of the present invention is a system for automatically tracking a golf club swung by a golfer. The system comprises a plurality of golf clubs. Each of the plurality of golf clubs comprises a device attached to a grip which is attached to a shaft which is attached to a golf club head. The device comprises a power source, a shock switch and a RFID component.

Abstract: An iron-type golf club head having a coated stepped sole is disclosed herein. The coated stepped sole is stepped such that the sole surface furthest from the face is raised away from the turf to minimize the turf contact through a golfer's swing particularly for the longer, less lofted irons. The surface friction is reduced by applying a thin dense chromium coating thorough electroplating to the stepped sole.

Abstract: A method, system and golf ball determine the side spin and/or back spin of a golf ball to facilitate the evaluation of a putt. In one embodiment, a system includes a golf ball and an offboard display device. The golf ball includes a golf ball body, a motion sensor disposed within the golf ball body and configured to measure acceleration of the golf ball along each of three mutually perpendicular axis, and a transmitter within the golf ball body transmits data representative of spin of the golf ball. The display device includes a receiver and a display, and the receiver receives data representative of the spin of the golf ball from the transmitter and the display is configured to provide a representation of a measure of the spin of the golf ball.

Abstract: A wood type golf club head having a plurality of interior recesses is disclosed herein. The plurality of interior recesses are preferably formed in a body of the golf club head and remove mass from the body to be used elsewhere on the golf club head to increase the inertial properties of the golf club head.

Abstract: A golf club having removable components includes a club head, a shaft, and a connection assembly. The club head includes a hosel having an upper treaded portion and a lower portion with a faceted cross-section. The connection assembly includes a sleeve mounted on the tip end of the shaft and a screw-cap. The sleeve, which has an aperture for receiving the tip end of the shaft, includes a lower section that has a multi-faceted surface for engaging the lower portion of the hosel. The screw-cap is mounted over the sleeve and includes a body having an upper area and a threaded area, the latter of which is capable of engaging the upper threaded portion of the hosel to removably secure the shaft to the club head.

Abstract: A club shaft that can be installed in a club head permanently or can be installed in clubs with interchangeable shaft features is disclosed herein. The invention is a measurement system that enables the capturing of the speed and motion of the golfer's swing. The invention uses magnetic material positioned on a face of a golf club head and an array of magnetic sensors.