Electrofishing apparatus and method
Patent 5270912 Issued on December 14, 1993. Estimated Expiration Date: 
April 30, 2012. 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 30, 2012. 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 ReferencesElectric barrier for fish Patent #: 4825810 InventorsAssigneeApplicationNo. 876180 filed on 04/30/1992US Classes:363/128, Thyristor43/17.1, Electric current or sonic wave energy307/106WAVE FORM OR WAVE SHAPE DETERMINATIVE OR PULSE-PRODUCING SYSTEMSExaminersPrimary: Voeltz, Emanuel T.Attorney, Agent or FirmInternational ClassesH02M 007/155A01K 079/00 AbstractTo minimize injury during electrofishing while inducing a high degree of electrotaxis, a packet of DC pulses having sharp leading edges and preferably an exponential or square decay are transmitted under water between an anode electrode and a cathode electrode several times each second to stimulate contraction of the red muscle tissues and bring about electrotaxis without inducing epileptic seizure of the white muscle tissues of fish and thereby avoiding injury to the fish.Other References
Field of SearchFor rectifier systemWith thyristor control means in the line circuit For plural phase to D.C. rectifier For full wave rectifier with at least 1 three electrode device Thyristor Plural phase to D.C. WAVE FORM OR WAVE SHAPE DETERMINATIVE OR PULSE-PRODUCING SYSTEMS With rectification or derectification With capacitor Electric current or sonic wave energy | |
