Inventor · San Diego, CA, US

John Ratzel

9Patents
5h-index
10Co-inventors
56Inventor score

Filing activity: Oct 2, 1997 → Aug 12, 2011

Most-cited inventions

PatentTitleAreaCited byStatus
US7483581B2 Apparatus and method for encoding digital image data in a lossless manner Electricity 35 Expired
US6985589B2 Apparatus and method for encoding and storage of digital image and audio signals Electricity 34 Expired
US8023750B2 Apparatus and method for encoding digital image data in a lossless manner Electricity 16 Active
US8270738B2 Apparatus and method for encoding digital image data in a lossless manner Electricity 11 Active
US6043781A Low insertion loss connection of an antenna to a mobile radio with retractable swiveling antenna feature Electricity 10 Expired
US5943623A Integrated control and signal processing in a cellular telephone Physics 3 Expired
US8098943B2 Apparatus and method for encoding digital image data in a lossless manner Electricity 2 Active
US7596277B2 Apparatus and method for detecting error in a digital image Electricity 2 Expired
US8813137B2 Apparatus and method for decoding digital image and audio signals Electricity 0 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.