We filed an L-1A visa petition with USCIS (regular processing, not premium processing) on 7/31/2017 and received the final approval notices on 8/29/2017.
USCIS Filing Date: 7/31/2017
USCIS Approval Date: 8/29/2017
Processing time from USCIS Filing to Approval: 29 Days
USCIS #: WAC-17-212-51068
Source: h1b now
