L1 Visa invalid upon H4 Approval?

[visa4sheila]

Hello,

Does an approval of H4 visa make an existing L1 visa invalid? Can both the visas be valid at the same time?

Thanks for your time and advise.
Sheila

[shervin143]

Duplicate post.
http://www.immihelp.com/forum/showthread.php?t=92021