Inventor · disambiguated record
William D. Chandler, Jr.
Also filed as: CHANDLER JR WILLIAM D · CHANDLER JR WILLIAM DAVID · CHANDLER WILLIAM D · CHANDLER WILLIAM D JR
55 granted patents·3 pending applications·708 citations·filing 1983–2023
98Inventor score
Files withCHANDLER SYSTEMS INC47CHANDLER JR WILLIAM D4WATER SOFT INC3SJE RHOMBUS2CHANDLER JR WILLIAM DAVID1
Top patents by PatentIndex Score
58 records- 0198US10479699B1Valve control apparatusCHANDLER SYSTEMS INC·Filed 2018·Granted Nov 19, 2019·11 cites·26 claims
- 0298US10011500B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2017·Granted Jul 3, 2018·20 cites·28 claims
- 0398US9970558B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2016·Granted May 15, 2018·18 cites·23 claims
- 0498US8535540B2Water softener system and methodCHANDLER JR WILLIAM D·Filed 2012·Granted Sep 17, 2013·26 cites·19 claims
- 0597US11209839B1Pump controller apparatusCHANDLER SYSTEMS INC·Filed 2020·Granted Dec 28, 2021·8 cites·38 claims
- 0697US10829388B1Valve control apparatusCHANDLER SYSTEMS INC·Filed 2019·Granted Nov 10, 2020·8 cites·24 claims
- 0797US9714715B2Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2015·Granted Jul 25, 2017·12 cites·35 claims
- 0897US8535539B2Water softener system and methodCHANDLER JR WILLIAM D·Filed 2012·Granted Sep 17, 2013·16 cites·16 claims
- 0997US8529768B2Water softener system and methodCHANDLER JR WILLIAM D·Filed 2012·Granted Sep 10, 2013·18 cites·11 claims
- 1096US11655904B1Valve control systemCHANDLER SYSTEMS INC·Filed 2022·Granted May 23, 2023·3 cites·34 claims
- 1196US11548795B1Water delivery control systemCHANDLER SYSTEMS INC·Filed 2021·Granted Jan 10, 2023·2 cites·34 claims
- 1296US10012319B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2017·Granted Jul 3, 2018·11 cites·40 claims
- 1396US8032256B1Liquid level control systemsSJE RHOMBUS·Filed 2009·Granted Oct 4, 2011·68 cites·15 claims
- 1496US6595051B1Fluid level sensing and control systemCHANDLER SYSTEMS INC·Filed 2001·Granted Jul 22, 2003·79 cites·28 claims
- 1596US4515692AWater filterWATER SOFT INC·Filed 1983·Granted May 7, 1985·109 cites·19 claims
- 1695US11807550B1Water control systemCHANDLER SYSTEMS INC·Filed 2022·Granted Nov 7, 2023·1 cites·34 claims
- 1795US10822251B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2019·Granted Nov 3, 2020·9 cites·21 claims
- 1894US9212070B2Water treatment system and methodCHANDLER JR WILLIAM D·Filed 2012·Granted Dec 15, 2015·10 cites·19 claims
- 1994US4659463ASystem to remove contaminants from waterWATER SOFT INC·Filed 1984·Granted Apr 21, 1987·79 cites·22 claims
- 2091US12422148B1Water heater systemCHANDLER SYSTEMS INC·Filed 2021·Granted Sep 23, 2025·1 cites·27 claims
- 2191US11807564B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2022·Granted Nov 7, 2023·1 cites·24 claims
- 2291US10948091B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2019·Granted Mar 16, 2021·5 cites·26 claims
- 2390US11542178B1Pison valve with annular passagesCHANDLER SYSTEMS INC·Filed 2021·Granted Jan 3, 2023·2 cites·34 claims
- 2489US12202741B1Water management systemCHANDLER SYSTEMS INC·Filed 2023·Granted Jan 21, 2025·0 cites·34 claims
- 2589US12202742B1Water management systemCHANDLER SYSTEMS INC·Filed 2023·Granted Jan 21, 2025·0 cites·34 claims
- 2689US10495230B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2018·Granted Dec 3, 2019·5 cites·28 claims
- 2788US10822250B1Valve control apparatusCHANDLER SYSTEMS INC·Filed 2019·Granted Nov 3, 2020·3 cites·20 claims
- 2887US11208335B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2020·Granted Dec 28, 2021·1 cites·34 claims
- 2987US5147530AWell water removal and treatment systemWATER SOFT INC·Filed 1988·Granted Sep 15, 1992·88 cites·59 claims
- 3086US10865123B1Valve control apparatusCHANDLER SYSTEMS INC·Filed 2019·Granted Dec 15, 2020·1 cites·23 claims
- 3184US10494268B1Valve control apparatusCHANDLER SYSTEMS INC·Filed 2018·Granted Dec 3, 2019·1 cites·22 claims
- 3282US11203532B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2020·Granted Dec 21, 2021·1 cites·28 claims
- 3380US7224283B1Enclosure for a wastewater fluid level sensing and control systemCHANDLER SYSTEMS INC·Filed 2005·Granted May 29, 2007·7 cites·18 claims
- 3477US11591240B1Water delivery control systemCHANDLER SYSTEMS INC·Filed 2021·Granted Feb 28, 2023·0 cites·28 claims
- 3577US10822252B1Valve control apparatusCHANDLER SYSTEMS INC·Filed 2019·Granted Nov 3, 2020·0 cites·25 claims
- 3676USD924177SPressure switchCHANDLER SYSTEMS INC·Filed 2020·Granted Jul 6, 2021·6 cites·1 claims
- 3773US10865124B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2020·Granted Dec 15, 2020·0 cites·34 claims
- 3873US7471207B1Wastewater fluid level sensing and control systemCHANDLER SYSTEMS INC·Filed 2006·Granted Dec 30, 2008·5 cites·32 claims
- 3972US10633262B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2018·Granted Apr 28, 2020·0 cites·24 claims
- 4072US10590008B1Liquid treatment control systemCHANDLER SYSTEMS INC·Filed 2018·Granted Mar 17, 2020·0 cites·28 claims
- 4172US10494267B1Valve control apparatusCHANDLER SYSTEMS INC·Filed 2018·Granted Dec 3, 2019·0 cites·20 claims
- 4270US7151459B1Wastewater fluid level sensing and control systemCHANDLER SYSTEMS INC·Filed 2006·Granted Dec 19, 2006·4 cites·20 claims
- 4367US6443005B1Pressure activated controlCHANDLER SYSTEMS INC·Filed 2000·Granted Sep 3, 2002·14 cites·24 claims
- 4466US11560956B1Liquid treatment apparatusCHANDLER SYSTEMS INC·Filed 2021·Granted Jan 24, 2023·0 cites·24 claims
- 4566USD646239SController housingSJE RHOMBUS·Filed 2010·Granted Oct 4, 2011·16 cites·1 claims
- 4664US7075443B1Wastewater fluid level sensing and control systemCHANDLER SYSTEMS INC·Filed 2004·Granted Jul 11, 2006·7 cites·24 claims
- 4761US10865122B1Valve control apparatusCHANDLER SYSTEMS INC·Filed 2018·Granted Dec 15, 2020·0 cites·28 claims
- 4861US7746237B1Wastewater fluid level sensing and control systemCHANDLER SYSTEMS INC·Filed 2008·Granted Jun 29, 2010·2 cites·14 claims
- 4961US5611616AElectrical controls enclosureCHANDLER SYSTEMS INC·Filed 1995·Granted Mar 18, 1997·24 cites·14 claims
- 5055US11192797B1Piston valve with annular passagesCHANDLER SYSTEMS INC·Filed 2020·Granted Dec 7, 2021·0 cites·20 claims
Showing the top 50 of 58 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →