Patents by Inventor Dereje Teferi Lemma

Dereje Teferi Lemma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for encoding and reading optical machine-readable data codes
    Patent number: 8757490
    Abstract: A method and apparatus for data encoding and optical recognition of encoded data includes generating symbols that represent data using angles (rather than linear dimensions as used for conventional bar codes). One embodiment uses spirals isocurves. Another uses parabolas isocurves. Methods for visually depicting such symbols, including symbols having gray values are disclosed. Methods for machine-based detection and decoding of such symbols regardless of their orientation relative to the machine is also disclosed.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: June 24, 2014
    Inventors: Dereje Teferi Lemma, Josef Bigun
  • Method and Apparatus for Encoding and Reading Optical Machine-Readable Data Codes
    Publication number: 20110303748
    Abstract: A method and apparatus for data encoding and optical recognition of encoded data includes generating symbols that represent data using angles (rather than linear dimensions as used for conventional bar codes). One embodiment uses spirals isocurves. Another uses parabolas isocurves. Methods for visually depicting such symbols, including symbols having gray values are disclosed. Methods for machine-based detection and decoding of such symbols regardless of their orientation relative to the machine is also disclosed.
    Type: Application
    Filed: June 11, 2010
    Publication date: December 15, 2011
    Inventors: Dereje Teferi Lemma, Josef Bigun