Poker Guess

Tom and Jerry is both a smart guys.
One day, Prof.James give them a test.
As known that there are 16 cards (as shown below)


Then the Prof.James pick up one of the card. After he see the card then tell Tom the number of the card, and tell Jerry the pattern of the card.
It mean that Tom know the number only, and Jerry know the pattern only.

Below is their communication
Prof. James: Tom, can you tell me what is the number and pattern of the card i picked?
Tom: I do not know
Jerry: Tom, I know you do not know the answer.
Tom: Now I know already
Jerry: I also know already

The question is: Which is the poker card Prof.James picked?