1
Douglas Sahm: Golf club. Players Golf, James C Wray, September 26, 1989: US04869507 (275 worldwide citation)

A weighting system for wood golf club heads comprising first, second and third weight receiving sockets and at least one set of removable and interchangeable weights receivable in the sockets. The first and third sockets are disposed in the heel and toe portions of the club head with axes substantia ...


2
Douglas Sahm: Golf club. Players Golf, James Creighton Wray, July 5, 1988: US04754977 (236 worldwide citation)

A golf club head is provided with sockets generally opposite the club face. The sockets receive removable and interchangeable weights fabricated from materials of varying density. Weighting changes can easily be effected by removing an existing set of weights and replacing them with a set made of gr ...