Does previous H1B visa stamp remains valid after getting H1b visa stamped from new employer?

Dear Reader & Kumar,

I am in very much confused state at the moment and looking for genuine help/advice.

I GOT MY H1B SPONSORSHIP FROM “A” COMPANY AND GOT VISA STAMPED IN JAN2015 WHICH IS VALID TIL SEP2017, BUT DUE TO SOME PERSONAL REASON I WAS NOT ABLE TO JOIN THAT COMPANY.

AND AFTER FEW MONTHS I JOIN “B” COMPANY WHICH UNDER CAP EXEMPT CATEGORY TRANSFERRED MY H1B PETITION AND AGAIN SENT MY PASSPORT FOR NEW H1B VISA STAMP WITH THERE INITIALS, THIS TIME AFTER GETTING MY PETITION TRANSFERRED, I CAME TO KNOW THAT USCIS TRANSFERRED MY H1B PETITION TO “B” COMPANY WITH 01 YEAR VALIDITY, TILL NOV 2016. (THOUGH FROM “A” COMPANY ITS VALID TILL SEP 2017). WHY? DON’T KNOW.

NOTE: 1) MY PASSPORT EXPIRY DATE IS NOV2016.

       2) AFTER PUTTING NEW H1B VISA STAMP FROM EMPLOYER "B" ON MY PP, CONSULATE HASN'T PUT ANY CANCELLED STAMP ON MY PREVIOUS VISA.

NOW MY QUESTION IS THAT:

  1. IF NOW MY PREVIOUS EMPLOYER WANTS ME TO JOIN CAN I USE MY PREVIOUS H1B PETITION AND VISA STAMPED BY THERE INITAILS WHICH IS VALID TILL SEP2017 (CONSULATE HAS NOT PUT ANY CANCELLED STAMP ON MY PREVIOUS VISA).

  2. OR ONCE A NEW VISA IS STAMPED ON PP PREVIOUS AUTOMATICALLY STANDS CANCEL WHETHER CONSULATE PUT CANCELLATION STAMP OR NOT.

Note: Company “A” is US based company and company “B” is indian company (which i joined and currently working, after getting my H1B transferred to Comapny “B”

PLEASE GUIDE ASAP.

  1. Technically H-1 is never “transferred”. You have 2 approved petitions from 2 different employers. Both are equally good for travel as long as the employer agrees. So you can enter US using A’s petition and visa stamp, or B’s petition and visa stamp.

  2. Visa stamp is not canceled until consulate marks it as canceled. It is still good for travel.

PS: May I suggest giving CAPS LOCK some rest next time you type a message here.