Inventor

David W. Caldwell

Inventor

Holland, MI, US

Overview

42→

Patents

1978–2021

Patent span

Electricity

Primary field (CPC H)

Patents· 42 as inventor

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

H03Kprimary

H03KPulse technique16%

A47BTables9%

F25DRefrigerators9%

G09FDisplaying9%

A47FSpecial furniture, fittings, or accessories for shops, storehouses, bars, restaurants or the like7%

G06FElectric digital data processing5%

H02JElectric power networks3%

H10HInorganic light-emitting semiconductor devices having potential barriers2%

Y10TTechnical subjects covered by former us classification2%

A01GHorticulture2%

PatentTitleYear

10,994,309System and method for identifying and transferring parcels from a first conveyor to a second conveyor2021 10,646,898System and method for identifying and transferring parcels from a first conveyor to a second conveyor2020 10,248,264Apparatus and method for determining a stimulus, including a touch input and a stylus input2019 10,185,439Time domain differential techniques to characterize various stimuli2019 9,851,834Time domain differential techniques to characterize various stimuli2017 9,437,786'Light emitting device for illuminating plants'2016 9,306,561'Touch switches and practical applications therefor'2016 9,182,098'Device for scattering light'2015 9,184,350'Light emitting device for illuminating plants'2015 9,041,286'Volumetric light emitting device'2015 8,866,497'Apparatus and method for determining a touch input'2014 8,307,549'Method of making an electrical circuit'2012 8,227,940'Touch switches and practical applications therefor'2012 8,135,482'Intelligent shelving system'2012 7,906,875'Touch switches and practical applications therefor'2011 RE042199'Integrated touch sensor and light apparatus'2011 7,840,286'Intelligent shelving system'2010 7,532,131'Multi-layer solid state keyboard'2009 7,361,860'Integrated touch sensor and light apparatus'2008 7,260,438'Intelligent shelving system'2007 7,242,393'Touch sensor with integrated decoration'2007 7,218,498'Touch switch with integral control circuit'2007 7,175,304'Integrated low profile display'2007 7,098,414'Integrated touch sensor and light apparatus'2006 7,030,513'Touch switch with integral control circuit'2006 6,944,018'Control system input apparatus and method'2005 6,897,390'Molded/integrated touch switch/control panel assembly and method for making same'2005 6,713,897'Touch switch with integral control circuit'2004 6,320,282'Touch switch with integral control circuit'2001 6,310,611'Differential touch sensor and control circuit therefor'2001 5,867,111'Touch control system'1999 5,594,222'Touch sensor and control circuit therefor'1997 5,572,205'Touch control system'1996 5,289,365'Modular network control system'1994 5,239,152'Touch sensor panel with hidden graphic mode'1993 5,189,417'Detection circuit for matrix touch pad'1993 5,164,609'Controllable power distribution system'1992 5,157,273'Modular power outlet strip'1992 5,153,572'Touch-sensitive control circuit'1992 4,947,053'High DC voltage power supply for motor vehicle electrical system'1990 4,780,619'High DC voltage power supply for motor vehicle electrical system'1988 4,099,477'Engine powered water craft'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–2016Patents assigned to CALDWELL DAVID W (7)· patent assignee history

1988–1997Based in Lapeer, MI, US· patent location history

1992–1994Patents assigned to DONNELLY CORP (6)· patent assignee history

1992–2019Based in Holland, MI, US· patent location history

2001–2016Patents assigned to TOUCHSENSOR TECH LLC (19)· patent assignee history

2001–2006Based in Naperville, IL, US· patent location history

2001Based in Winfield, IL, US· patent location history

2012–2016Patents assigned to SCHREIBER THOMAS M (3)· patent assignee history

2014–2019Patents assigned to ALSENTIS LLC (4)· patent assignee history

2020–2021Based in Louisville, KY, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TOUCHSENSOR TECH LLC	19	2001–2016
CALDWELL DAVID Wself	7	1978–2016
DONNELLY CORP	6	1992–1994
ALSENTIS LLC	4	2014–2019
SCHREIBER THOMAS M	3	2012–2016

Locations

Location	Patents	Span
Holland, MI, US	32	1992–2019
Naperville, Illinois, US	3	2001–2006
Lapeer, MI, US	3	1988–1997
Louisville, KY, US	2	2020–2021
Winfield, Illinois, US	1	2001