In the present invention a method of compressing a signature signal is disclosed. The signature signal is divided into a plurality of signature segment signals where each segment is encoded by using a modified ring-encoding method, such that the total number of grid points along the perimeter of all...http://www.google.ca/patents/US5091975?utm_source=gb-gplus-sharePatent US5091975 - Method and an apparatus for electronically compressing a transaction with a human signature
