Abstract: The present invention pertains to a golf tee comprising a stem portion and a top portion connected to the stem portion, the top portion includes an upper surface that opposes the stem and having a convex shape, free of an adhesive layer or material that anchors the ball on the upper surface against uneven ground. The golf tee minimizes friction and other impeding forces between the tee and the ball by reducing an area of contact between the tee and the ball, while preventing the player from installing the golf tee other than vertically into the ground, or horizontal to the Earth's surface, thereby preventing the golf player from having to alter his or her posture and stroke according to the mounting of the ball.

Abstract: A self-sealing fastener for installation of roofing materials for creating a substantially watertight seal around fastener penetrations where roofing materials or panels are affixed to an underlying roof deck by the fasteners. Also disclosed is a method for installing the self-sealing fastener for attachment of roofing materials to an underlying roof deck with the penetrations areas or holes created by the fasteners being substantially sealed against water penetration.

Abstract: An elongate bunker spike that secures a flexible golf bunker liner to the earth strata when the bunker spike is driven through the bunker liner into the earth strata. The bunker spike has a point member adjacent to the axial forward spike end, a ribbed member adjacent to the axial rearward spike end and wherein the ribbed member is contiguous with the point member. A head is at the axial rearward spike end wherein the ribbed member joins the head at the underneath surface. A barb extends from the underneath surface of the head whereby the barb engages the flexible golf bunker liner when the elongate bunker spike is embedded in the earth strata.