An infant car seat with an adjustable base platform provides a variable angle of tilt for the seat. The base platform has a visual indicator showing the degree of tilt that has been selected. This visual indicator can include a clear plastic window in the base platform, through which a number or other...http://www.google.es/patents/US7207628?utm_source=gb-gplus-sharePatente US7207628 - Infant car seat with adjustable base platform