ALEXANDRIA, Va., Dec. 9 -- Acushnet, Fairhaven, Massachusetts, has been assigned a patent (9,833,665) developed by Michael R. Madson, Pawtucket, Rhode Island, for a "golf ball dimple based on witch of Agnesi curve." The abstract states: "A golf ball having the contour wherein at least one dimple has the cross-section of the dimple surface based on a modified witch of Agnesi curve and defined by the equation in the form of: .function..times..times..times..times. ##EQU00001## wherein: y is the ver . . .