Inventor · disambiguated record
David K. Walker
Also filed as: WALKER DAVID K
15 granted patents·2 pending applications·1,477 citations·filing 1980–2022
95Inventor score
Files withMILLITECH CORP6SEPARATION DESIGN GROUP IP HOLDINGS LLC3SEPARATION DESIGN GROUP LLC3GALBRAITH STEPHEN DOUGLAS2BROWNLEE RICHARD T1
Top patents by PatentIndex Score
17 records- 0196US5227800AContraband detection systemMILLITECH CORP·Filed 1991·Granted Jul 13, 1993·363 cites·34 claims
- 0296US5073782AContraband detection systemMILLITECH CORP·Filed 1988·Granted Dec 17, 1991·227 cites·42 claims
- 0394US5202692AMillimeter wave imaging sensors, sources and systemsMILLITECH CORP·Filed 1991·Granted Apr 13, 1993·161 cites·19 claims
- 0494US4910523AMicrometer wave imaging deviceMILLITECH CORP·Filed 1987·Granted Mar 20, 1990·162 cites·68 claims
- 0593US4340977ACatenary mitral valve replacementBROWNLEE RICHARD T·Filed 1980·Granted Jul 27, 1982·228 cites·10 claims
- 0692US4901084AObject detection and location systemMILLITECH CORP·Filed 1988·Granted Feb 13, 1990·100 cites·64 claims
- 0791US8888902B2Portable oxygen enrichment device and method of useGALBRAITH STEPHEN DOUGLAS·Filed 2012·Granted Nov 18, 2014·14 cites·47 claims
- 0890US9492781B2Portable oxygen enrichment device and method of useSEPARATION DESIGN GROUP LLC·Filed 2014·Granted Nov 15, 2016·9 cites·18 claims
- 0989US4759759ABubble heart valveWALKER DAVID K·Filed 1983·Granted Jul 26, 1988·137 cites·29 claims
- 1088US9199055B2Ultra rapid cycle portable oxygen concentratorSEPARATION DESIGN GROUP LLC·Filed 2014·Granted Dec 1, 2015·18 cites·21 claims
- 1188US8894751B2Ultra rapid cycle portable oxygen concentratorGALBRAITH STEPHEN DOUGLAS·Filed 2010·Granted Nov 25, 2014·32 cites·32 claims
- 1284US9993765B2Portable oxygen enrichment device and method of useSEPARATION DESIGN GROUP LLC·Filed 2016·Granted Jun 12, 2018·2 cites·14 claims
- 1381US11369768B2Ultra rapid cycle portable oxygen concentratorSEPARATION DESIGN GROUP IP HOLDINGS LLC·Filed 2019·Granted Jun 28, 2022·1 cites·20 claims
- 1473US11278697B2Ultra rapid cycle portable oxygen concentratorSEPARATION DESIGN GROUP IP HOLDINGS LLC·Filed 2019·Granted Mar 22, 2022·1 cites·24 claims
- 1555US2025339637A9Ultra rapid cycle portable oxygen concentratorSEPARATION DESIGN GROUP IP HOLDINGS LLC·Filed 2022·Application pending·0 cites
- 1651US5145809AFabrication of gunn diode semiconductor devicesMILLITECH CORP·Filed 1990·Granted Sep 8, 1992·22 cites·24 claims
- 1743US2015238721A1Electronic E-CylinderVETLAND MEDICAL SALES AND SERVICES LLC·Filed 2014·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →