Hopefully, There are many job opportunities coming up in India for MEMS and Nanotechnology. Specificallly, GE Global Research (also known as JFWTC) at Bangalore has a MEMS Design group.

What Companies hold MEMS patents

There are compass systems using MEMS.

MEMS means micro electromechanical systems. The MEMS compass system uses a vibrating structure gyroscope to operate. Most MEMS inertial navigation systems have integrated GPS. The very sophisticated ones are independent to prevent jamming, they use computers and an accelerometer as well as a MEMS gyroscope to operate.

for non-mems maple for mems dark bow

No, the image sensor is not a MEMS flow sensor as many think.