1. Rynbrandt, J.D.: Electrical car and roadway system, patent number-4476947 (1984)
2. Tajima, F.: Permanent rotating electric machine and electric car, patent number-5419406 (1995)
3. Zhang, J.: Electric car charging systems, patent number-7768229 B2 (2010)
4. Thipse, S.S.: Compressed air car, tech monitor (2008)
5. Hasebe, M.: Drive mechanism for electric car, patent number-5396968 (1995)