Patents

• 1. Russian Federation Patent # 2032998 from 19.03.1992. Anikeev V.N., Dokukin M.Yu. et al.
• 2. Russian Federation Patent # 2065891 from 24.05.1993. Khvesyuk V.I., Tsygankov P.A., Mishanov A.V.
• 3. USSR Patent # 1264821 from 02.02.1985. Dokukin M.Yu., Khvesyuk V.I.et al.