Credit Inquiries

I was reading all of your info about how I can raise my score up.... I had only 2 major credit cards so I applied for 3 cards on the same day...I as turned down for 2 of the cards but was approved for a Master card...I have been watching my credit score, the next day my credit scored dropped from a 585 to a 572 just like that... I understand its because of all of the inquires with in a period of time.... How long will it take for the inquires not take effect on my credit score????
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12 months will jump your score 50 -80 points with the new good credit not maxed out