A Portrait of Invention: David Friedman's 'Inventor' Series

Photographer David Friedman has been photographing inventors since 2008. During the course of that time he has sat down with 47 men and women who have their names on patents for products as diverse as cellphones, US Navy antennas and 'Squirt-gun Shoes'. We spoke to David recently about his project - read what he has to say and take a look at a selection of images. See gallery