Multiple H1B petitions with 2 different employers

This will not be problem, if you do not get selected for the 2nd employer and you get approved from the first, you could even file to change your...

I did my biometrics on April 2nd. How long would it take to receive any kind of response from USCIS?

The USCIS website shows processing times of up to 3 months from the time you filed your applications.

Recently got my work permit through the deferred action program, I will be on maternity leave will it affect me when I renew it?

You do not have to work just because you have work permit, it just allows you to work. So there should not be any problem renewing it.

You could get another L1B, however you would have to be out of the United States for 365 days cumulatively.

H1b got the change of the contract paying him half of previous contract from current employer but still meets prevailing wage.

The employer could "change" the employees H-1B, to part-time or to a different job title, but not the same job title and hours with a reduced pay....

I AM U.S CITIZEN GETTING MARRIED TO MEXICAN CITIZEN SHE HAS A VISA TO TRAVEL INTO U.S. SHOULD I GET MARRIED IN U.S

If you marry within the first sixty days, the USCIS may find that you committed fraud on entry, if you are entering on a visitor or student visa....

Im 26 yrs old with permanent resident card. My father became usa citizen when i was 9yr old but he never applied for me

So you are a citizen, you can go apply for a passport, with your green card and your Father's naturalization certificate, your parents marriage...

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Evidence of income for wife's visa.

You will need to get a joint affidavit of supporter, someone who meets the poverty guidelines and is a US Citizen or a permanent resident....

Wrong spellings of my patents on my English Translation of the Birth Certificate

Just have it retranslated, doesn't have to be professionally translated. Anyone competent in both your native language and English can certify that...

Permanent residence based on permanent residency?

There are many ways to become a permanent resident, that however is not one of them.