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Cary Subel, left, and Alaey Kumar are co-founders of SafeSleeve, one of many companies selling products that block radio frequency energy from cellphones, tablets and laptop computers. Photo courtesy of SafeSleeve

Stories this photo appears in:

Co. Aims to Counter Possible Device Dangers

TECH: Cases for Phones, Laptops Address Concerns Over Radiation Exposure

Cary Subel and Alaey Kumar have built a business on the foundation of technology — specifically, public unease over technology.

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