John Peter Duffield — 19 Patents at Electronics For Imaging

John Peter Duffield has been granted 19 US patents while listed as an inventor at Electronics For Imaging. The first was granted in 2004 and the most recent in June 2025. John Peter Duffield ranks #229,345 of 4,157,543 US inventors in our database (top 5.5%). Patent records list John Peter Duffield in Stratham, NH, US.

Issued Patents All Time

Showing 1–19 of 19 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12320681	Linear rotary encoder	—	2025-06-03
12000717	Linear rotary encoder	—	2024-06-04
11667133	Woodgrain suppression in inkjet printing	Hui Zhang	2023-06-06
11525707	Linear rotary encoder	—	2022-12-13
11173724	Woodgrain suppression in inkjet printing	Hui Zhang	2021-11-16
10752022	Multilayer imaging with a high-gloss clear ink layer	Bruce Klemann, Joshua MCGRATH	2020-08-25
10195874	Inert UV inkjet printing having dual curing modes for ultraviolet-curable ink	Jonathan Barry, Lianhui Cong, Arthur L. Cleary	2019-02-05	$9,515,000
10000075	Multilayer imaging with a high-gloss clear ink layer	Bruce Klemann, Joshua MCGRATH	2018-06-19	$24,300,000
9718269	Multi-waveform inkjet nozzle correction	—	2017-08-01	$11,103,000
9079427	Staggered ultra-violet curing systems, structures and processes for inkjet printing	—	2015-07-14	$4,875,000
8807727	Gas removal from a fluid delivery system	Chris Porter	2014-08-19	$5,233,000
8684511	Ink jet UV pinning for control of gloss	Joseph A. Lahut, Dwight Cram, Peter Heath	2014-04-01	$10,907,000
8672451	Reduced gloss banding through low ink volume deposition per print pass	Joseph A. Lahut, Dwight Cram, Peter Heath	2014-03-18	$12,307,000
8616691	Gas removal from a fluid delivery system	Chris Porter	2013-12-31	$9,917,000
8459778	Reduced gloss banding through low ink volume deposition per print pass	Joseph A. Lahut, Dwight Cram, Peter Heath	2013-06-11	$4,417,000
7396119	Apparatus and methods for water-based ink printing	—	2008-07-08	$2,682,000
7090327	Water-based ink jet printer	—	2006-08-15	$4,729,000
6905189	Wet capping tray for ink jet printheads	—	2005-06-14
6786578	Multi-color, multi-speed printing apparatus	Richard P. Aschman, Peter Heath	2004-09-07

John Peter Duffield — 19 Patents

Issued Patents All Time

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