Modified Delta C Encode, Improved Delta B Decode
Original Publication Date: 1979-Jan-01
Included in the Prior Art Database: 2005-Feb-19
U.S. Patent 3,723,710 discloses a bar code which utilizes three different bar widths A, B and C which may be arbitrarily provided with width ratios 1:2:3. The patent discloses two techniques for decoding the encoded data. 0ne technique measures the distance between adjacent leading edges and between adjacent trailing edges and a reference to decode the encoded data.