H1 filed from previous company case approved in Jul 2015, Can we do anything now?

[lakshman]

Hi All,
Greetings.

My previous company filed H1 for me 3 years ago, and then I resigned. recently I did check status with EAC number on the site and showing as My Case Approved in July,2015
I don't have any documents or copies of it apart from EAC number.

Can we do any thing about it? is that approval still valid?

I have traveled previously on L1 and B1.
your expert advice would be great help

Thanks in advance.

Regards,
Lakshman