Patani Bohras are Bohras that follow Sunni Hanafi fiqh.
History
In fifteenth century, there was schism in Bohra community of Patan in Gujarat as large number converted from Mustaali Ismaili to mainstream Hanafi Sunni Islam. The leader of this conversion movement to Sunni was Syed Jafar Ahmad Shirazi who also had the support of Mughal governor of Gujarat. Thus this new group is known as Jafari Bohras and Patani Bohras. In 1538, Syed Jafar Ahmad Shirazi convinced Patani Bohras to cease social relations with Ismaili Bohras. The cumulative results of these pressures resulted in large number of Bohras converting from Ismaili Shia fiqh to Sunni Hanafi fiqh.
References
Patani Bohras Wikipedia(Text) CC BY-SA