What's the difference between I-797A and I-797B

When I transferred to the new company, I got the approval notice I-797A. But there was a error of my bith date. So company filed amended H-1B. When I received the approval notice, I found it's I-797B.

Is there any difference between I-797A and I-797B?

Thank you.

所有跟帖： 

• I797B is H1B approval without I-94. -usedtobeadoctor- ♀ (731 bytes) () 03/24/2008 postreply 13:27:11

• 回复：I797B is H1B approval without I-94. -JZ031105- ♂ (0 bytes) () 03/24/2008 postreply 13:59:19

• 回复：回复：I797B is H1B approval without I-94. -JZ031105- ♂ (240 bytes) () 03/24/2008 postreply 14:01:41