Inventor · Ottawa, ON, CA

John Roberts

29Patents
10h-index
11Co-inventors
72Inventor score

Filing activity: Nov 14, 1977 → May 22, 2018

Most-cited inventions

PatentTitleAreaCited byStatus
US6682402B1 Polishing pads and methods relating thereto Performing Operations; Transporting 36 Expired
US6217434A Polishing pads and methods relating thereto Performing Operations; Transporting 29 Expired
US6869350B2 Polishing pads and methods relating thereto Performing Operations; Transporting 29 Expired
US6293852A Polishing pads and methods relating thereto Performing Operations; Transporting 29 Expired
US9525413B2 Power switching systems comprising high power e-mode GaN transistors and driver circuitry Electricity 21 Active
US5509080A Bass clipping circuit Electricity 19 Expired
US5652800A Automatic mixer priority circuit Electricity 17 Expired
US4166245A Simultaneous display of multiple characteristics of complex waveforms Physics 17 Expired
US8791508B2 High density gallium nitride devices using island topology Electricity 17 Active
US9659854B2 Embedded packaging for devices and systems comprising lateral GaN power transistors Electricity 14 Active
US9064947B2 Island matrixed gallium nitride microwave and power switching transistors Electricity 9 Active
US9029866B2 Gallium nitride power devices using island topography Electricity 9 Active
US9105560B2 Devices and systems for power conversion circuits Electricity 8 Active
US9818692B2 GaN semiconductor device structure and method of fabrication by substrate replacement Electricity 7 Active
US4818951A Gain control or multiplier circuits Electricity 7 Expired
US5119426A Linear array level meter displaying multiple audio characteristics Physics 7 Expired
US9660639B2 Distributed driver circuitry integrated with GaN power transistors Electricity 6 Active
US6843712B2 Polishing pads and methods relating thereto Performing Operations; Transporting 5 Expired
US6515859B2 Heat sink alignment Electricity 5 Expired
US9692408B2 Devices and systems comprising drivers for power conversion circuits Electricity 5 Active
US9508797B2 Gallium nitride power devices using island topography Electricity 4 Active
US5875825A Multi-fuel bib Performing Operations; Transporting 3 Expired
US4953222A Multiple channel gated amplifier system Electricity 3 Expired
US10290623B2 Gate input protection for devices and systems comprising high power E-mode GaN transistors Electricity 2 Active
US10281655B2 Field inversion waveguide using micro-prism array Physics 2 Active

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