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2. Patent of Russian Federation No. 2290883. A Technique of Anchoring of Electromyographic Electrodes to Smooth Muscles of Gastrointestinal Tract in Experiment. A. A. Kromin, O. Yu. Zenina, Bull. Izobr. Poleznye Modeli, No. 1, Pt. I, p. 166 (2007). Published 10.01.2007.
3. Patent of Russian Federation No. 52562. Electromyographic Bipolar Silver Spherical Electrode. A. A. Kromin, Yu. P. Ignatova, O. Yu. Zenina. Bull. Izobr. Poleznye Modeli, No. 10, P. 3, 809 (2006). Published 10.04.2006.
4. Patent No. 2368402. A Technique for Inducing of Behavioral Response in Chronic Experiment and a Device for Inducing of Behavioral Food Responses in Chronic Experiment. A. A. Kromin, Yu. P. Ignatova, E. P. Sergeeva, O. Yu. Zenina. Bull. Izobr. Poleznye Modeli, No. 27 (2009). Published 27.09.2009.
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