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	Inventor Presentation assigned to the inventors as a curious persons: theory, patent law, associations, domestic inventions. http://www.pronalazac.co.yu/
	Inventor Veljko Milkovic New source of energy on the basis of inertial forces and gravitational potential, Petrovaradin fortress - underground, Self-heating ecological house, antigravitational motor, perpetuum mobile, world of mysteries, ideas for arts, hobby, business . . . Bulevar Cara Lazara 56, 21000 Novi Sad 021/366-487, 064/153-20-72 http://www.veljkomilkovic.com/