In this simple innovation, a small refill-based pen is attached to a cap worn on a single finger. This innovation could be useful forphysically challenged people who do not have a thumb or even abled persons for repetitive marking on any object or surface for which one need not use three fingers required to hold a normal pen.http://nif.org.in/innovation/single_finger_pen/59
Link: Easy to use Economic User Friendly
Manufacturing Capacity: b) Design Support, c) Sub-contracting, e) Franchising
Problem Scale: Case specific global problem