Inventor · disambiguated record
Richard Chang
Also filed as: CHANG RICHARD · CHANG RICHARD M
41 granted patents·10 pending applications·470 citations·filing 1996–2021
98Inventor score
Files withWELCOME CO LTD19CHANG RICHARD11KINGSAND MACHINERY LTD5WELCOME COMPANY LTD5ACCUMANNO MARIO BERNARDO2
Top patents by PatentIndex Score
51 records- 0197US7210386B1Quickly detachable protective cover unit of a table sawing machineKINGSAND MACHINERY LTD·Filed 2005·Granted May 1, 2007·87 cites·5 claims
- 0295US9937661B2Storage electric sealerWELCOME CO LTD·Filed 2016·Granted Apr 10, 2018·12 cites·8 claims
- 0391US10683115B2Portable air extracting deviceWELCOME CO LTD·Filed 2018·Granted Jun 16, 2020·3 cites·12 claims
- 0491USD823913SSealerWELCOME CO LTD·Filed 2016·Granted Jul 24, 2018·42 cites·1 claims
- 0585US9809340B1Rechargeable sealer with storage functionWELCOME CO LTD·Filed 2017·Granted Nov 7, 2017·5 cites·7 claims
- 0685US8287335B2Abrasive apparatus of a sanderCHANG RICHARD·Filed 2010·Granted Oct 16, 2012·6 cites·6 claims
- 0784USD812662SSealerWELCOME CO LTD·Filed 2017·Granted Mar 13, 2018·24 cites·1 claims
- 0883US7315010B2Electric heat sealer with safety deviceWELCOME CO LTD·Filed 2005·Granted Jan 1, 2008·6 cites·18 claims
- 0980US7700897B2Hand-held electric sealer having a detachable electric sealing moduleWELCOME CO LTD·Filed 2006·Granted Apr 20, 2010·6 cites·12 claims
- 1080US7034252B2Hand-held electric heat sealerWELCOME CO LTD·Filed 2000·Granted Apr 25, 2006·12 cites·1 claims
- 1179US7090569B1Manual clutch device for a roller sander for controlling reciprocating movement of a rollerKINGSAND MACHINERY LTD·Filed 2005·Granted Aug 15, 2006·8 cites·4 claims
- 1279US6998577B2Table-top electric heat sealerWELCOME CO LTD·Filed 2004·Granted Feb 14, 2006·11 cites·18 claims
- 1378US7939783B2Hand-held electric sealer with detachable sealing moduleCHANG RICHARD·Filed 2007·Granted May 10, 2011·4 cites·10 claims
- 1477US6805040B1Tea makerFiled 2004·Granted Oct 19, 2004·27 cites·11 claims
- 1575USD579034SElectric sealerCHANG RICHARD·Filed 2008·Granted Oct 21, 2008·21 cites·1 claims
- 1675US6335515B1Electric heat sealer with offset sealer portionWELCOME COMPANY LTD·Filed 2000·Granted Jan 1, 2002·12 cites·31 claims
- 1773USD845370SDouble-end sealerWELCOME CO LTD·Filed 2018·Granted Apr 9, 2019·14 cites·1 claims
- 1873US7810540B2Hand-held electric sealer with dual headsCHANG RICHARD·Filed 2008·Granted Oct 12, 2010·3 cites·20 claims
- 1972US7285934B2Combination of power supply and detachable electric implementCHANG RICHARD·Filed 2004·Granted Oct 23, 2007·17 cites·10 claims
- 2072USD542315SElectric sealerCHANG RICHARD·Filed 2006·Granted May 8, 2007·19 cites·1 claims
- 2170US6573477B1Safety electric sealer having a safety gateWELCOME COMPANY LTD·Filed 2002·Granted Jun 3, 2003·8 cites·8 claims
- 2269US6326594B1Hand-held electric sealer with safety meansWELCOME COMPANY LTD·Filed 1998·Granted Dec 4, 2001·20 cites·5 claims
- 2368US6630647B2Hand-held electric heat sealerWELCOME CO LTD·Filed 2002·Granted Oct 7, 2003·5 cites·4 claims
- 2467USD823914SSealing and vacuum-pumping deviceWELCOME CO LTD·Filed 2017·Granted Jul 24, 2018·11 cites·1 claims
- 2567US6936790B1Electric heat sealer with safety deviceFiled 2003·Granted Aug 30, 2005·6 cites·24 claims
- 2664US6770849B2Table-top electric heat sealerWELCOME CO LTD·Filed 2002·Granted Aug 3, 2004·4 cites·21 claims
- 2764US6627853B2Electric heat sealer with safety deviceWELCOME COMPANY LTD·Filed 2000·Granted Sep 30, 2003·5 cites·40 claims
- 2863US9132521B2Main shaft structure of tool machineCHANG RICHARD·Filed 2012·Granted Sep 15, 2015·1 cites·8 claims
- 2963US7243692B2Chisel quickly adjusting and positioning device for a chiselling machineKINGSAND MACHINERY LTD·Filed 2005·Granted Jul 17, 2007·2 cites·9 claims
- 3063US6919537B2Electric heat sealerWELCOME CO LTD·Filed 2004·Granted Jul 19, 2005·8 cites·7 claims
- 3161USD860277SBattery-type vacuum-pumping deviceWELCOME CO LTD·Filed 2018·Granted Sep 17, 2019·8 cites·1 claims
- 3261US6802246B1Timer tea makerFiled 2004·Granted Oct 12, 2004·11 cites·12 claims
- 3359USD498383STimer tea makerFiled 2003·Granted Nov 16, 2004·11 cites·1 claims
- 3458US6064038AHand-held electric sealer with detachable heat resistant cover sheetWELCOME COMPANY LTD·Filed 1998·Granted May 16, 2000·18 cites·24 claims
- 3556US7312421B2Detachable heat sealing apparatusCHOU AMMY·Filed 2004·Granted Dec 25, 2007·3 cites·8 claims
- 3656US7291810B2Hand-held electric heat sealerWELCOME CO LTD·Filed 2006·Granted Nov 6, 2007·0 cites·19 claims
- 3756US2008202346A1Tea maker with agitatorACCUMANNO MARIO BERNARDO·Filed 2007·Application pending·0 cites
- 3855US2006113292A1Table-top electric heat sealerWELCOME CO LTD·Filed 2006·Application pending·0 cites
- 3954US2008199580A1Tea maker with timerACCUMANNO MARIO BERNARDO·Filed 2007·Application pending·0 cites
- 4051US2008314888A1Sealing mechanism for hand-held electric sealerCHANG RICHARD·Filed 2007·Application pending·0 cites
- 4145US2021339900A1Handheld rapid heating device for cutting and adhering thin filmCHANG RICHARD·Filed 2021·Application pending·0 cites
- 4244US2006023872A1Portable electronic device customization kitCHANG RICHARD·Filed 2005·Application pending·0 cites
- 4343USD943651SHandheld rapid heating device for cutting and adhering plastic thin filmBRAVO INTERNATIONAL MAN LTD·Filed 2021·Granted Feb 15, 2022·1 cites·1 claims
- 4439US2011253260A1Wood cutting machine with a fine adjustment deviceCHANG RICHARD·Filed 2010·Application pending·0 cites
- 4539US2017297753A1Electrical vacuum-pumping deviceWELCOME CO LTD·Filed 2017·Application pending·0 cites
- 4638US6232579B1Electric heat sealer with safety deviceWELCOME CO LTD·Filed 1998·Granted May 15, 2001·6 cites·9 claims
- 4738US2006169119A1Quick adjusting device for a lower guide base of a band sawKINGSAND MACHINERY LTD·Filed 2005·Application pending·0 cites
- 4838US2008060496A1Transmission device for a band sawKING SAW MACHINERY LTD·Filed 2006·Application pending·0 cites
- 4930US6065765AMethod of molding and assembling a bicycle frameFiled 1996·Granted May 23, 2000·3 cites·11 claims
- 5029USD539313SBody of the band saw machineKINGSAND MACHINERY LTD·Filed 2004·Granted Mar 27, 2007·0 cites·1 claims
Showing the top 50 of 51 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →