Golf club head
Patent 4438931 Issued on March 27, 1984. Estimated Expiration Date: 
September 16, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 16, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1968092 Reinforced metal shell golf club head, with keel Patent #: 4313607 InventorAssigneeApplicationNo. 06/418636 filed on 09/16/1982US Classes:473/346With internal support rib or injected materialExaminersPrimary: Marlo, George J.Attorney, Agent or FirmInternational ClassA63B 53/04 (20060101)AbstractA golf club head comprising two or more thin shell sections, for instance a front shell section and a rear shell section, or a face shell section, a top shell section and a body shell section including a bottom section and a side section, are secured together along their edges to form a one-piece shell having a sealed space. A shaft is also secured together with the shell sections when securing these sections. The sealed space is filled with a filler material such as foamed urethane and rubber. | |
