Bipolar electrosurgical forceps
Patent 4938761 Issued on July 3, 1990. Estimated Expiration Date: 
March 6, 2010. 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.
March 6, 2010. 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 3685518 Electrosurgical forceps Thermocouple radio frequency lesion electrode Bipolar electrosurgical instrument Device for bipolar high-frequency coagulation of biological tissue Disposable bipolar instrument Patent #: 4686980 InventorAssigneeApplicationNo. 319050 filed on 03/06/1990US Classes:606/51, With forceps or tweezers606/40, Coagulation606/52With forceps or tweezersExaminersPrimary: Cohen, Lee S.Attorney, Agent or FirmInternational ClassA61B 017/39AbstractA bioplar electrosurgical forceps carries a thermocouple junction at the distal end of each of two mutually opposed prongs. The junctions are formed by welding a constantan wire directly to the ferrous metal prongs, thereby avoiding the need for electrical isolation.Other References
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