Inventor

Patricia J. Donaldson

Inventor

Pittsford, NY, US

Overview

1992–2021

Patent span

Performing operations

Primary field (CPC B)

Patents· 51 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

B41Jprimary

B41JTypewriters25%

G03GElectrography21%

B29CShaping or joining of plastics18%

B33YAdditive manufacturing, i.e. manufacturing of three-dimensional [3d] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3d printing, stereolithography or selective laser sintering14%

H04NPictorial communication, e.g. television8%

B22FWorking metallic powder2%

B29LIndexing scheme associated with subclass b29c, relating to particular articles2%

G06KGraphical data reading2%

Y02PClimate change mitigation technologies in the production or processing of goods2%

A61JContainers specially adapted for medical or pharmaceutical purposes1%

PatentTitleYear

11,104,162Method, apparatus, device and system for correction of encoder runout2021 10,752,028Dual encoder system to minimize reflex printing variation2020 10,717,305Method, apparatus, device and system for correction of encoder runout2020 10,639,841System and method for operating a three-dimensional printer to compensate for radial velocity variations2020 10,635,954Dot clock signal generation for operating ejectors in multiple color stations in a substrate printer2020 10,569,524System and method for protection of printed images formed on surfaces of three-dimensional printed objects2020 10,150,282System and method for additive manufacture of chemical delivery devices using halftone screening2018 10,052,823System and method for test pattern formation during three-dimensional object printing2018 9,849,661System and method for protection of printed images formed on surfaces of three-dimensional printed objects2017 9,844,961System and method for analysis of low-contrast ink test patterns in inkjet printers2017 9,751,259'System and method for operating a three-dimensional printer to compensate for radial velocity variations'2017 9,738,032'System for controlling operation of a printer during three-dimensional object printing with reference to a distance from the surface of object'2017 9,707,785'System and method for analysis of compact printed test patterns'2017 9,701,064'Digital manufacturing system for printing three-dimensional objects on a rotating core'2017 9,694,574'System for detecting inoperative inkjets in printheads ejecting clear ink using thermal substrates'2017 9,604,412'Digital manufacturing system for printing three-dimensional objects on a rotating surface'2017 9,561,649'System for detecting inoperative inkjets in printheads ejecting clear ink using thermal substrates'2017 9,550,328'System and method for reducing or eliminating hue shift in three-dimensional printed objects'2017 9,409,389'Coordination of printhead/substrate position with transfer of marking material'2016 9,375,962'System and method for identification of marks in printed test patterns'2016 9,358,820'System for detecting inoperative inkjets in printheads ejecting clear ink using thermal substrates'2016 9,162,509'System for detecting inoperative inkjets in printheads ejecting clear ink using thermal substrates'2015 9,067,445'System and method of printhead calibration with reduced number of active inkjets'2015 8,888,225'Method for calibrating optical detector operation with marks formed on a moving image receiving surface in a printer'2014 8,814,300'System and method for sub-pixel ink drop adjustment for process direction registration'2014 8,801,140'In situ calibration of multiple printheads to reference ink targets'2014 8,711,429'Systems and methods for printing images outside a normal color gamut in image forming devices'2014 8,662,625'Method of printhead calibration between multiple printheads'2014 8,562,101'Method and system for correcting media shift during identification of printhead roll'2013 8,414,102'In situ calibration of multiple printheads to reference ink targets'2013 8,134,741'System and method for controlling consistent color quality'2012 8,010,001'Specular diffuse balance correction method'2011 7,948,658'Tone reproduction curve linearization'2011 7,864,373'Method and system for toner reproduction curve linearization using least squares solution of monotone spline functions'2011 7,688,340'System and method for controlling the lower power bound for a raster output scanner in a color xerographic printer'2010 7,498,578'Method and system for calibrating a reflection infrared densitometer in a digital image reproduction machine'2009 7,239,820'Tone reproduction curve systems and methods'2007 6,970,662'Systems and methods for in situ setting charge voltages in a dual recharge system'2005 6,694,109'Real-time control of tone reproduction curve by redefinition of lookup tables from fit of in-line enhanced toner area coverage (ETAC) data'2004 6,175,698'Toner concentration control for an imaging system'2001 6,173,133'Feedback toner concentration control for an imaging system'2001 6,169,861'Feedback toner concentration control for an imaging system'2001 6,160,970'Feed forward and feedback toner concentration control for an imaging system'2000 6,160,971'Feed forward and feedback toner concentration control for an imaging system'2000 6,047,142'Toner age calculation in print engine diagnostic'2000 5,745,819'Reproduction machine having image deletions reducing control system and method'1998 5,669,049'Multi-roll developer housing with converging belt to roll spacing'1997 5,561,013'Magenta toner and imaging processes'1996 5,536,608'Imaging processes using cyan and black toners'1996 5,512,988'Apparatus and method for controlling development of developer material on a photoreceptive member'1996 5,157,441'Dark decay control system utilizing two electrostatic voltmeters'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–2021Patents assigned to XEROX CORP (50)· patent assignee history

1992–2021Based in Pittsford, NY, US· patent location history

2012–2014Patents assigned to DONALDSON PATRICIA J (6)· patent assignee history

2013Patents assigned to CALAMITA JAMES P (1)· patent assignee history

2014Patents assigned to FOLKINS JEFFREY J (1)· patent assignee history

2014Patents assigned to HSU TA-CHEN (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
XEROX CORP	50	1992–2021
DONALDSON PATRICIA Jself	6	2012–2014
CALAMITA JAMES P	1	2013
FOLKINS JEFFREY J	1	2014
HSU TA-CHEN	1	2014

Locations

Location	Patents	Span
Pittsford, New York, US	51	1992–2021