Tennis racket
Patent 4429873 Issued on February 7, 1984. Estimated Expiration Date: 
August 12, 2001. 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.
August 12, 2001. 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 3889951 Laminated game rackets and method of constructing same Composite high strength to weight structure having shell and sleeved core Tennis racket Racket and a method for manufacturing same Patent #: 4203596 InventorAssigneeApplicationNo. 06/292246 filed on 08/12/1981US Classes:473/536, Plural fiber compositions156/245, In configured mold156/79, Subsequent to assembly of laminae264/257, One component is a fibrous or textile sheet, web, or batt264/46.6Against inner surface of a hollow preform or solidified layerExaminersPrimary: Pinkham, Richard C.Assistant: Schneider, Matthew L. Attorney, Agent or FirmInternational ClassesA63B 49/02 (20060101)A63B 49/04 (20060101) A63B 49/10 (20060101) Foreign Application Priority Data1980-08-13 BEAbstractThere is described a tennis racket the frame and shaft of which are formed by synthetic resin-impregnated fibres, such as glass and/or carbon fibres, aromatic polyamide or boron fibres, and the core both of the frame and the shaft is preferably filled with a synthetic foam with the purpose of determining the profile of those components formed by the fibres, in which inside the core is present at least in places in the frame and/or the shaft, at least one wood layer.Other References
| |
