help entering using b visa

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Registered Users (C)
my uncle came to usa 2 year ago with a business visa stayed in newyork for a month in a company hotel. his company send him to sell some of the products. he came and visited me and stayed for a week and left to india.

now his daughter came to usa married and has a new born. now he wants to visit his daughter and will stay for a month. since he has 10 year business visa can he use the same visa. will there be any problem with immigration officer

(he already bought the tickets to usa coming on may end)
 
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