Racket frame
Patent 4283050 Issued on August 11, 1981. Estimated Expiration Date: 
May 29, 1999. 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.
May 29, 1999. 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 1403143 1520109 2064435 2836529 3166319 3352566 3640533 3708380 Racket Games racquets Patent #: 4119313 InventorApplicationNo. 06/043159 filed on 05/29/1979US Classes:473/535Fiber reinforced plastic frameExaminersPrimary: Apley, Richard J.Attorney, Agent or FirmInternational ClassesA63B 49/02 (20060101)A63B 49/14 (20060101) Foreign Application Priority Data1976-12-10 JPAbstractA fiber reinforced plastic racket frame advantageously usable for a tennis racket has a head portion accompanied with at least an elongated, relatively thin metallic protective member, which has cut-outs or meshes in the construction, formed integral with the outer surface layer of the fiber reinforced plastic envelope at the racket frame. Protection by this additional member assures enriched frictional resistance and reduced collapse of the head portion and presence of the meshes or cut-outs provides firm anchoring of the protective member to the envelope outer surface layer. | |
