Inventor

Randal Scott Williamson

Inventor

Georgetown, KY, US

Overview

2003–2021

Patent span

Physics

Primary field (CPC G)

Patents· 56 as inventor

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

G03Gprimary

G03GElectrography43%

B41JTypewriters27%

H01RElectrically-conductive connections8%

LOC165%

B65HHandling thin or filamentary material, e.g. sheets, webs, cables4%

H04LTransmission of digital information, e.g. telegraphic communication4%

G09CCiphering or deciphering apparatus for cryptographic or other purposes involving the need for secrecy3%

LOC183%

G01RMeasuring electric variables1%

G06KGraphical data reading1%

PatentTitleYear

11,126,112Toner agitator support2021 11,119,443Replaceable unit for an electrophotographic image forming device having a magnetic sensor2021 11,022,909Toner container having an encoded member and an alignment guide for locating a sensor relative to the encoded member2021 11,022,910Sensor positioning by a replaceable unit of an image forming device2021 10,983,457Sealing assembly for an electrophotographic image forming device2021 10,921,393Magnetometer chip sensor array for reading a magnetic PUF, including a magnetic PUF film or tape, and systems incorporating the reader2021 10,859,944Toner container having a common input gear for a toner agitator assembly and an encoded member2020 10,775,737Replaceable unit for an electrophotographic image forming device having a magnetic sensor2020 10,649,399Replaceable unit for an electrophotographic image forming device having a magnetic sensor2020 10,527,967Toner container having a common input gear for a toner agitator assembly and an encoded member2020 10,527,969Drive actuation of a toner agitator assembly and an encoded member of a toner container in an electrophotographic image forming device2020 10,496,027Replaceable unit for an electrophotographic image forming device having a retractable electrical connector2019 10,444,661Toner cartridge having a biasing assembly for biasing a media feed roll in an electrophotographic image forming device2019 10,429,790Replaceable unit for an electrophotographic image forming device having a retractable electrical connector2019 10,203,628Toner agitator assembly2019 10,197,964Replaceable unit for an electrophotographic image forming device having a retractable electrical connector2019 10,185,247Toner cartridge having a media feed roll assembly2019 RE047166Toner cartridge having loading and latching features2018 9,983,508Image forming device having a replaceable toner cartridge that includes an engagement member for actuating a shutter2018 9,971,295Electrophotographic image forming device having a replaceable unit that includes a retractable electrical connector2018 9,798,268'Toner cartridge having a movable engagement member that protrudes from a front of the toner cartridge for acutating a shutter'2017 9,746,815'Replaceable unit for an electrophotographic image forming device having a retractable electrical connector'2017 9,608,634'Toothed-rack physical unclonable function'2017 9,608,828'Elongated physical unclonable function'2017 9,597,879'Variable force wiper for maintenance station of imaging device'2017 9,563,169'Replaceable unit for an electrophotographic image forming device having a retractable electrical connector'2017 9,436,128'Toner cartridge having an engagement member for actuating a shutter'2016 D0759156'Laser printer toner cartridge'2016 D0759155'Laser printer toner cartridge'2016 D0759157'Laser printer toner cartridge'2016 D0759154'Laser printer toner cartridge'2016 9,316,944'Toner cartridge having an alignment member for aligning with a developer unit in an electrophotographic image forming device'2016 9,229,367'Carriage assembly for toner cartridge loading having a pivotable cradle and a stationary hold-down feature'2016 9,164,425'Toner cartridge having loading and latching features'2015 9,152,083'Carriage assembly for toner cartridge loading and latching'2015 9,120,316'Variable force wiper for maintenance station of imaging device'2015 9,104,141'Toner cartridge having a shutter with bypassing actuation'2015 8,873,996'Toner system for an image forming device including a toner cartridge having a shutter with bypassing actuation'2014 8,752,941'Fluid container having latching interface for micro-fluid applications'2014 8,567,932'Fluid container having fluid interface for micro-fluid applications'2013 8,348,397'Fluid height backpressure device in a system for supplying fluid to a printhead'2013 D0667491'Color ink tank with micro fluid applications'2012 8,256,880'Fluid height backpressure device in a system for supplying fluid to a printhead'2012 D0665841'Ink tank for micro-fluid applications'2012 8,192,000'Fluid height backpressure system for supplying fluid to a printhead and backpressure device used therein'2012 7,735,951'Alignment method for hand-operated printer'2010 7,661,791'Apparatus and method for performing mechanical printhead alignment in an imaging apparatus'2010 7,604,320'Maintenance on a hand-held printer'2009 7,524,051'Hand-operated printer having a user interface'2009 7,500,732'Maintenance and docking station for a hand-held printer'2009 7,370,860'Automatic edge guide assembly using springs and tapered surfaces'2008 7,131,644'Imaging apparatus having an automatic sheet feeder'2006 7,128,391'Self aligning printhead carrier bearings for an imaging apparatus'2006 6,726,384'Paper controlled clutch for a paper exit system in a printer'2004 6,644,779'Rotating waste ink accumulation system'2003 6,637,859'Ink jet mist control system'2003

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2003–2021Patents assigned to LEXMARK INT INC (52)· patent assignee history

2003–2017Based in Lexington, KY, US· patent location history

2012–2013Patents assigned to COFFEY JOHNNIE (5)· patent assignee history

2012–2015Patents assigned to WILLIAMSON RANDAL S (4)· patent assignee history

2012–2013Patents assigned to KOMPLIN STEVEN ROBERT (3)· patent assignee history

2013–2017Patents assigned to FUNAI ELECTRIC CO (4)· patent assignee history

2013–2021Based in Georgetown, KY, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
LEXMARK INT INC	52	2003–2021
COFFEY JOHNNIE	5	2012–2013
FUNAI ELECTRIC CO	4	2013–2017
WILLIAMSON RANDAL Sself	4	2012–2015
KOMPLIN STEVEN ROBERT	3	2012–2013

Locations

Location	Patents	Span
Georgetown, KY, US	38	2013–2021
Lexington, KY, US	18	2003–2017