Inventor

Michael Craig Leemhuis

Inventor

Nicholasville, KY, US

Overview

1991–2021

Patent span

Physics

Primary field (CPC G)

Patents· 70 as inventor

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

G03Gprimary

G03GElectrography65%

B41JTypewriters12%

B65HHandling thin or filamentary material, e.g. sheets, webs, cables7%

LOC165%

B60JWindows, windscreens, non-fixed roofs, doors, or similar devices for vehicles2%

F16DCouplings for transmitting rotation2%

Y10TTechnical subjects covered by former us classification2%

G01FMeasuring volume, volume flow, mass flow or liquid level1%

H05KPrinted circuits1%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests1%

PatentTitleYear

10,921,730Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing2021 10,684,577Imaging transfer to intermediate transfer member2020 10,591,846Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing2020 10,474,060Toner level sensing using rotatable magnets having varying angular offset2019 10,451,997Toner level detection measuring an orientation of a rotatable magnet having a varying orientation relative to a pivot axis2019 10,451,998Toner level detection measuring an orientation of a rotatable magnet having a varying radius2019 10,429,765Toner container for an image forming device having magnets of varying angular offset for toner level sensing2019 10,345,736Toner level detection measuring a radius of a rotatable magnet2019 10,289,024Toner level sensing for a replaceable unit of an image forming device2019 10,228,636Toner agitator assembly2019 10,108,142Drive coupler2018 10,042,319Image forming device having a replaceable unit that includes a latching mechanism2018 9,983,506Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing2018 9,891,553'Toner level sensing for a replaceable unit of an image forming device'2018 9,869,950'Toner agitator assembly'2018 9,829,855Drive coupler2017 9,798,287'Replaceable unit for an electrophotographic image forming device having a latching mechanism'2017 9,632,477'Systems for detecting an axially moveable member within a toner cartridge'2017 9,519,261'Positional control features of a replaceable unit for an electrophotographic image forming device'2016 9,519,243'Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing'2016 9,477,177'Toner cartridge having a shutter lock mechanism'2016 9,477,175'Toner level sensing for a replaceable unit of an image forming device'2016 9,454,125'Systems and methods for reincorporating waste toner with fresh toner within a toner cartridge'2016 9,395,645'Capacitive toner level sensor'2016 9,360,796'Angled toner paddles for a replaceable unit of an image forming device'2016 9,291,940'Toner feed profile'2016 9,280,087'Electrophotographic image forming device latching system for retaining a replaceable unit'2016 9,261,851'Positional control features of a replaceable unit for an electrophotographic image forming device'2016 9,261,818'Venting system for a toner cartridge for use with an image forming device'2016 9,152,080'Replaceable unit for an image forming device having a toner agitator that includes a magnet for rotational sensing'2015 9,128,444'Toner level sensing for a replaceable unit of an image forming device using pulse width patterns from a magnetic sensor'2015 9,128,443'Toner level sensing for replaceable unit of an image forming device'2015 9,128,412'Venting system for a toner cartridge for use with an image forming device'2015 9,104,134'Toner level sensing for replaceable unit of an image forming device'2015 9,069,286'Rotational sensing for a replaceable unit of an image forming device'2015 9,046,817'Replaceable unit for an image forming device having a sensor for sensing rotational motion of a paddle in a toner reservoir of the replaceable unit'2015 9,031,424'Systems and methods for measuring a particulate material'2015 8,989,611'Replaceable unit for an image forming device having a falling paddle for toner level sensing'2015 D0724656'Laser printer toner cartridge'2015 D0724138'Laser printer toner cartridge'2015 8,948,660'Toner cartridge having engagement features to actuate a developer unit shutter'2015 8,948,659'Shutter for a developer unit for use with an image forming device'2015 8,867,968'Movable toner port cover member for a replaceable unit of an imaging device'2014 8,774,685'Venting system for a toner cartridge for use with an image forming device'2014 8,774,684'Toner cartridge having a pivoting exit port cover'2014 8,761,639'Replaceable unit for an electrophotographic image forming device having a latching mechanism'2014 8,718,496'Capacitive toner level sensor'2014 8,649,710'Toner cartridge having a pivoting exit port cover'2014 8,301,057'Roller separation cam with automatic engagement'2012 8,099,012'Developer roll lip seal'2012 D0627389'Developer unit'2010 7,725,060'Skirt for toner cartridge'2010 7,657,213'Doctor blade with tangential working tip'2010 7,424,253'Toner metering device'2008 D0550762'Photoconductor unit'2007 7,158,745'Method and device to regulate toner in an image forming device'2007 7,149,467'Waste toner system for an image forming device'2006 7,055,946'Apparatus and method for printing with an inkjet drum'2006 7,003,245'Door assembly for an image forming device'2006 6,935,734'Apparatus and method for printing using a coating solid'2005 6,733,106'Ink jet maintenance station with radial orientation'2004 6,238,114'Print media handling system and method of using same'2001 6,183,079'Coating apparatus for use in an ink jet printer'2001 6,181,908'Apparatus for corrugating materials'2001 5,810,353'Modular output stackers for printers'1998 5,761,565'Color highlighting accessory for a monochromatic printer'1998 5,618,036'Printer with distribution stations having U-shaped sheet guide'1997 D0356816'Duplex attachment for a printer'1995 5,316,539'Self-adjusting paper recurler'1994 5,005,820'Paper tray with leaf spring'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–2021Based in Nicholasville, KY, US· patent location history

1994–2021Patents assigned to LEXMARK INT INC (68)· patent assignee history

2004Based in Lexington, KY, US· patent location history

2012–2015Patents assigned to LEEMHUIS MICHAEL CRAIG (6)· patent assignee history

2014Patents assigned to CAVILL GREGORY ALAN (3)· patent assignee history

2015Patents assigned to BAKER RONALD WILLARD (2)· patent assignee history

2015Patents assigned to BROWN STEPHEN ANDREW (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
LEXMARK INT INC	68	1994–2021
LEEMHUIS MICHAEL CRAIGself	6	2012–2015
CAVILL GREGORY ALAN	3	2014
BAKER RONALD WILLARD	2	2015
BROWN STEPHEN ANDREW	2	2015

Locations

Location	Patents	Span
Nicholasville, KY, US	69	1991–2021
Lexington, KY, US	1	2004