Inventor · Meredith, NH, US

John Peter Duffield

19Patents
3h-index
11Co-inventors
57Inventor score

Filing activity: Mar 15, 2002 → May 3, 2024

Most-cited inventions

PatentTitleAreaCited byStatus
US6905189B1 Wet capping tray for ink jet printheads Performing Operations; Transporting 12 Expired
US6786578B1 Multi-color, multi-speed printing apparatus Performing Operations; Transporting 7 Expired
US8684511B2 Ink jet UV pinning for control of gloss Performing Operations; Transporting 5 Active
US9718269B2 Multi-waveform inkjet nozzle correction Performing Operations; Transporting 2 Active
US11173724B1 Woodgrain suppression in inkjet printing Performing Operations; Transporting 2 Active
US9079427B2 Staggered ultra-violet curing systems, structures and processes for inkjet printing Performing Operations; Transporting 2 Active
US10000075B2 Multilayer imaging with a high-gloss clear ink layer Performing Operations; Transporting 1 Active
US7396119B2 Apparatus and methods for water-based ink printing Performing Operations; Transporting 1 Active
US7090327B1 Water-based ink jet printer Performing Operations; Transporting 1 Expired
US8616691B2 Gas removal from a fluid delivery system Performing Operations; Transporting 1 Active
US8459778B2 Reduced gloss banding through low ink volume deposition per print pass Performing Operations; Transporting 1 Active
US8672451B2 Reduced gloss banding through low ink volume deposition per print pass Performing Operations; Transporting 0 Active
US10195874B2 Inert UV inkjet printing having dual curing modes for ultraviolet-curable ink Performing Operations; Transporting 0 Active
US8807727B2 Gas removal from a fluid delivery system Performing Operations; Transporting 0 Active
US10752022B2 Multilayer imaging with a high-gloss clear ink layer Performing Operations; Transporting 0 Active
US12320681B2 Linear rotary encoder Performing Operations; Transporting 0 Active
US11525707B2 Linear rotary encoder Performing Operations; Transporting 0 Active
US11667133B2 Woodgrain suppression in inkjet printing Performing Operations; Transporting 0 Active
US12000717B2 Linear rotary encoder Performing Operations; Transporting 0 Active

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