Inventor · disambiguated record
Douglas W. Francis
Also filed as: FRANCIS DOUGLAS W
4 granted patents·45 citations·filing 1999–2005
73Inventor score
Technology areasB05B
Files withFRANCIS DOUGLAS W3
Top patents by PatentIndex Score
4 records- 0161US6267303B1Sprinkler system fertilizer injectorFiled 1999·Granted Jul 31, 2001·35 cites·3 claims
- 0242USD513711SRingFRANCIS DOUGLAS W·Filed 2004·Granted Jan 24, 2006·6 cites·1 claims
- 0332USD531537SRingFRANCIS DOUGLAS W·Filed 2005·Granted Nov 7, 2006·3 cites·1 claims
- 0427USD531926SRingFRANCIS DOUGLAS W·Filed 2005·Granted Nov 14, 2006·1 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →