SAN FRANCISCO, United States (AFP) — Amazon has received patents for electronic systems that could enable warehouse monitoring through electronic pulses that guide employees by location. The patent filings, first reported this week by the news site Geekwire, come amid concerns over workplace conditions for the company, which has seen rapid growth in its warehouses or “fulfillment centers” key to its logistics. The publicly available patent documents show how wrist-worn devices could deliver ultrasonic pulses […]