Abstract: Golf club heads are described having a club head portion, a shaft portion connected to the club head portion, and a grip portion connected to the shaft portion. The club head portion has a heel portion, a sole portion, a toe portion, a crown portion, a hosel portion, and a striking face. The striking face can have a center face roll contour, a toe side roll contour, a heel side roll contour, a center face bulge contour, a crown side bulge contour, and a sole side bulge contour. The toe side roll contour can be more lofted than the center face roll contour. The heel side roll contour can be less lofted than the center face roll contour. The crown side bulge contour can be more open than the center face bulge contour, and the sole side bulge contour can be more closed than the center face bulge contour.

Abstract: Aspects of the invention are directed to golf club having a crown, a sole, a face, and a face alignment feature located on the face.

Abstract: A putter head having an upward-facing surface portion and a diffusely reflecting area of at least 5% of a total upward-facing area, which is also has a low gloss value and preferential CIELab L* value, an alignment feature delineating a transition between a first portion of the upward-facing surface having an area of contrasting shade or color with a shade or color of a portion of the face adjacent the upward-facing surface, and a face with at least a portion adjacent the upward-facing surface having a diffusely reflecting face surface area with a low gloss value and preferential chroma value. The alignment feature may have a preferential contrasting color difference between the first portion of the upward-facing surface and a portion of the face, and preferential CIELab ?L difference value between a portion of the face and the diffusely reflecting surface of the upward-facing surface.

Abstract: Described are embodiments of golf club heads having an internal cavity and features that cause the golf club head to have an improved acoustic performance when striking a golf ball. Some embodiments include one or more weight tracks and/or weight ports formed in the sole for receiving adjustable weights. The golf club heads can include one or more internal ribs, thickened wall regions, and/or posts positioned within the cavity that increase the rigidity of the club head and improve the acoustic performance of the club head when striking a ball.

Abstract: A golf club head having a nonmetallic crown bonded to a frame in close proximity to the face.

Abstract: A golf club head comprises a body having a face, a crown and a sole together defining an interior cavity. The body having a head-shaft connection system, a rear weight fastened to the golf club head proximate the rear end of the club head and proximate the Y-Z plane, and a front weight port or an internal cap connection system for securing the rear weight; in combination with specific windows regarding the moments of inertia and center of gravity.

Abstract: Described are embodiments of golf club heads having an internal cavity and features that cause the golf club head to have an improved acoustic performance when striking a golf ball. Some embodiments include one or more weight tracks and/or weight ports formed in the sole for receiving adjustable weights. The golf club heads can include one or more internal ribs, thickened wall regions, and/or posts positioned within the cavity that increase the rigidity of the club head and improve the acoustic performance of the club head when striking a ball.

Abstract: A golf club head includes a club body including a crown, a sole, a skirt disposed between and connecting the crown and the sole and a face portion connected to a front end of the club body. The face portion includes a geometric center defining the origin of a coordinate system when the golf club head is ideally positioned, the coordinate system including an x-axis being tangent to the face portion at the origin and parallel to a ground plane, a y-axis intersecting the origin being parallel to the ground plane and orthogonal to the x-axis, and a z-axis intersecting the origin being orthogonal to both the x-axis and the y-axis. The golf club head defines a center of gravity CG, the CG being a distance CGY from the origin as measured along the y-axis and a distance CGZ from the origin as measured along the z-axis.

Abstract: A golf club head having a flexible channel to improve the performance of the club head, and a channel tuning system to reduce undesirable club head characteristics introduced, or heightened, via the flexible channel. The channel tuning system includes a sole engaging channel tuning element in contact with the sole and the channel. The club head may include an aerodynamic configuration, as well as a body tuning system.

Abstract: A golf club head and golf club having large head dimensions, and large face characteristics, as well as unique mass property attributes driven by relationships not often considered in conventional club head design, to achieve a resistance to squaring the club head during a golf swing that is comfortable to the novice golfer, while increasing stability during off-center impacts and obtaining preferred launch characteristics. This is achieved in part via establishing a club head configuration and associated weight distribution to yield a center of gravity location that results in a preferred magnitude of Delta1 and Delta2 values, CG angle, moments of inertia, and associated ratios, relationships, and club head mass property characteristics influenced by these variables to achieve improved performance.

Abstract: A golf club and golf club head having a high static loft angle, low forward center of gravity, and enhanced z-axis gear effect via a large roll radius and/or tightly controlled moment of inertia about the CG x-axis, Ixx, associated with upward and downward twisting of the club head.

Abstract: Golf clubs have a primary alignment feature including a paint or masking line which delineates the transition between at least a first portion of the crown having an area of contrasting shade or color with the shade or color of the face. Some have a primary alignment feature including a paint or masking line which delineates the transition between a first portion of the crown having an area of contrasting shade or color and the area of shade or color of the face. A secondary alignment feature includes a paint or masking line that delineates the transition between the first portion of the crown having an area of contrasting shade or color with the shade or color of the face and a second portion of the crown having an area of contrasting shade or color with the shade or color of the first portion.

Abstract: A golf club head is provided with an electronic display that is visible to a user of the golf club head when the golf club head is in the address position, such as for displaying one or more images to the user. The electronic display may include a memory, a microprocessor, and a battery, and may be configured to communicate with a user operable electronic device via a wired or a wireless communication protocol. For example, the electronic display may be configured to receive one or more images from the user operable electronic device, to store the one or more images in the memory, and to display the one or more images to the user.

Abstract: A golf club head includes a club body including a crown, a sole, a skirt disposed between and connecting the crown and the sole and a face portion connected to a front end of the club body. The face portion includes a geometric center defining the origin of a coordinate system when the golf club head is ideally positioned, the coordinate system including an x-axis being tangent to the face portion at the origin and parallel to a ground plane, a y-axis intersecting the origin being parallel to the ground plane and orthogonal to the x-axis, and a z-axis intersecting the origin being orthogonal to both the x-axis and the y-axis. The golf club head defines a center of gravity CG, the CG being a distance CGY from the origin as measured along the y-axis and a distance CGZ from the origin as measured along the z-axis.

Abstract: Aspects of the invention are directed to golf club having a crown, a sole, a face, and a primary alignment feature hard tooled into the golf club head. In some embodiments the golf club has a primary alignment feature comprising a line delineating a transition between at least a portion of the crown having an area of contrasting shade or color with a shade or color of the face. The primary alignment feature is hard tooled into the golf club head with the face of the golf club body.

Abstract: A golf club head and golf club having a lightweight non-metallic face insert bonded in an insert opening, large head dimensions, and large face characteristics, as well as unique mass property attributes driven by relationships not often considered in conventional club head design, to achieve a resistance to squaring the club head during a golf swing that is comfortable to the novice golfer, stability during off-center impacts, and preferred launch characteristics. This is achieved in part via establishing a club head configuration and associated center of gravity location that results in a preferred magnitude of Delta1 and Delta2 values, CG angle, moments of inertia, and associated ratios, relationships, and club head mass property characteristics influenced by these variables to achieve improved performance.

Abstract: A golf club head having a flexible channel to improve the performance of the club head, and a channel tuning system to reduce undesirable club head characteristics introduced, or heightened, via the flexible channel. The channel tuning system includes a sole engaging channel tuning element in contact with the sole and the channel. The club head may include an aerodynamic configuration, as well as a body tuning system.

Abstract: A golf club head comprises a body having a face, a crown and a sole together defining an interior cavity. The body having a channel located on the sole and extending generally from a heel end of the body to a toe end of the body. A weight member movably positioned within the channel such that a position of the weight member within the channel is able to be adjusted, thereby adjusting a location of a center of gravity of the body. Additionally, adjustment of the weight member provides a maximum x-axis adjustment range of the position of the center of gravity (Max ?CGx) that is greater than 2 mm and a maximum z-axis adjustment range of the center of gravity (Max ?CGz) that is less than 2 mm.

Abstract: Golf club heads are described having a club head portion, a shaft portion connected to the club head portion, and a grip portion connected to the shaft portion. The club head portion has a heel portion, a sole portion, a toe portion, a crown portion, a hosel portion, and a striking face. The striking face can have a center face roll contour, a toe side roll contour, a heel side roll contour, a center face bulge contour, a crown side bulge contour, and a sole side bulge contour. The toe side roll contour can be more lofted than the center face roll contour. The heel side roll contour can be less lofted than the center face roll contour. The crown side bulge contour can be more open than the center face bulge contour, and the sole side bulge contour can be more closed than the center face bulge contour.

Abstract: Aspects of the invention are directed to golf club having a crown, a sole, a face, and a primary alignment feature hard tooled into the golf club head. In some embodiments the golf club has a primary alignment feature comprising a line delineating a transition between at least a portion of the crown having an area of contrasting shade or color with a shade or color of the face. The primary alignment feature is hard tooled into the golf club head with the face of the golf club body.