This post was first published on 19th August, 2014. Every blind person aspires to live a life of independence, a life of freedom and free will, a life free from intrusion, physical and psychological. Some patented inventions have attempted to enhance this very independence, and I will, in my upcoming posts, endeavor to take an unbiased look at some of them. In 1991, Hsieh Chi-Sheng filed a patent for an electronic talking stick for the blind. Before we get into details, one must understand…