Electrosurgical generator
Patent 4658819 Issued on April 21, 1987. Estimated Expiration Date: 
April 21, 2004. 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.
April 21, 2004. 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 3601126 3699967 3885569 3897788 Test and control device for electrosurgical apparatus Signal generating device and method for producing coagulation electrosurgical current Uncomplicated load-adapting electrosurgical cutting generator Constant output electrosurgical unit Electrosurgical unit Multiple source electrosurgical generator InventorsApplicationNo. 06/531758 filed on 09/13/1983US Classes:606/34, Systems606/38, With feed back control606/39, Cutting606/50Bipolar electrodesExaminersPrimary: Howell, Kyle L.Assistant: Smith, Ruth S. Attorney, Agent or FirmInternational ClassA61B 18/12 (20060101)AbstractAn electrosurgical generator having a source of electrosurgical energy connected to a patient and including control circuitry for decreasing the output power from the source with increasing patient impedance, the rate of power decrease being substantially greater than that which would result if the output voltage from the source were maintained constant over the range of increasing patient impedance. The control circuitry may, in particular, decrease the output power over the range of increasing patient impedance in accordance with the square of the impedance. | |
