Inventor · Sunnyvale, CA, US

Alfred Riddle

27Patents
6h-index
18Co-inventors
66Inventor score

Filing activity: Oct 27, 1989 → Aug 4, 2023

Most-cited inventions

PatentTitleAreaCited byStatus
US7263871B2 System and method for gas analysis using doubly resonant photoacoustic spectroscopy Physics 40 Expired
US5828477A Multi-tone phase modulation for light wave communication system Electricity 31 Expired
US7398672B2 System and method for gas analysis using photoacoustic spectroscopy Physics 25 Active
US7765871B2 System and method for gas analysis using photoacoustic spectroscopy Physics 22 Active
US8092084B2 System and method for temperature measurement Physics 16 Active
US10236922B2 Systems and methods for tunable out-of-band interference mitigation Electricity 8 Active
US5045731A Ultraminiature 180 degree phase shifter Electricity 4 Expired
US9634823B1 Systems for integrated self-interference cancellation Electricity 4 Active
US10425115B2 Systems and methods for configurable hybrid self-interference cancellation Electricity 3 Active
US9979374B2 Integrated delay modules Electricity 3 Active
US10243598B2 Systems for integrated self-interference cancellation Electricity 2 Active
US10804943B2 Systems and methods for configurable hybrid self-interference cancellation Electricity 2 Active
US11515906B2 Systems and methods for tunable out-of-band interference mitigation Electricity 2 Active
US7443894B2 System and method for laser temperature compensation Electricity 1 Active
US9819325B2 Time delay filters Electricity 1 Active
US10050597B2 Time delay filters Electricity 1 Active
US10623047B2 Systems and methods for tunable out-of-band interference mitigation Electricity 1 Active
US11764825B2 Systems and methods for tunable out-of-band interference mitigation Electricity 1 Active
US10050664B1 Enhanced linearity mixer Electricity 1 Active
US10862528B2 Systems and methods for tunable out-of-band interference mitigation Electricity 1 Active
US10187030B2 High quality factor time delay filters using multi-layer fringe capacitors Electricity 1 Active
US10454444B2 Integrated delay modules Electricity 1 Active
US11211969B2 Enhanced linearity mixer Electricity 0 Active
US11128329B2 Systems and methods for configurable hybrid self-interference cancellation Electricity 0 Active
US10447228B2 High quality factor time delay filters using multi-layer fringe capacitors Electricity 0 Active

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