Abstract: A golf ball having between 1,000 and 2,500 dimples and a plurality of secondary depressions between said dimples on the exterior surface thereof. The secondary depressions are of spherical cross section and may be uniformly or randomly placed on the surface of the ball. The secondary depressions are of a depth from 0.001" to 0.005" and a diameter from 0.01" to 0.05". The invention allows for decreased in-flight drag forces compared to a golf ball without the claimed secondary depressions.

Abstract: A set of golf clubs which utilizes progressively longer hosel lengths for the purpose of enlarging the main body of the clubhead and/or redistributing weight within the main body of the clubhead. The hosel length progresses from a very short hosel (1 3/8") on the lowest lofted iron, (the number 1 iron), to a conventional length hosel (25/8") on the sand wedge. By reducing the length of the hosel, weight is made available that can be used to enlarge the size of the clubhead and/or redistribute weight within the main body of the clubhead.

Abstract: A mechanical locking device for use in attaching the shaft of a golf club to the clubhead. An angle is cast inside the hosel at the base of the hosel bore. The tip of the shaft is cut at an angle matching the angle at the bottom of the hosel bore, such that when the shaft is inserted into the bore, there is no room for lateral movement or twisting of the shaft. This device eliminates the risk that the shaft will separate from the clubhead if the epoxy cement bond should break.

Abstract: A wood-type golf club head comprising toe, heel, top and sole portions, a front face bounded by the toe, heel, top and sole portions, and a rear wall bounded by the toe, heel, top and sole portions, a peripheral wall depending from the periphery of the sole portion to define a sole cavity in the sole portion, and two struts extending from a portion of the peripheral wall adjacent the front face to a portion of the peripheral wall adjacent the rear wall, the struts being in part substantially parallel to each other and in part diverging from each other and defining therebetween and in cooperation with the portion of the peripheral wall adjacent the front face, a central portion of the sole cavity, the peripheral wall being interrupted adjacent the rear wall, such that the central portion of the sole cavity is open to the rear of the club head.

Abstract: A mechanical locking device for use in attaching the shaft of a golf club to the clubhead. An angle is cast inside the hosel at the base of the hosel bore. The tip of the shaft is cut at an angle matching the angle at the bottom of the hosel bore, such that when the shaft is inserted into the bore, there is no room for lateral movement or twisting of the shaft. This device eliminates the risk that the shaft will separate from the clubhead if the epoxy cement bond should break.