Inventor · disambiguated record
Roy D. Sawyer
Also filed as: SAWYER ROY D
3 granted patents·135 citations·filing 1981–1991
76Inventor score
Files withNALCO CHEMICAL CO3
Top patents by PatentIndex Score
3 records- 0187US5066199AMethod for injecting treatment chemicals using a constant flow positive displacement pumping apparatusNALCO CHEMICAL CO·Filed 1989·Granted Nov 19, 1991·64 cites·12 claims
- 0274US4335072AOverhead corrosion simulatorNALCO CHEMICAL CO·Filed 1981·Granted Jun 15, 1982·35 cites·10 claims
- 0371US5195879AImproved method for injecting treatment chemicals using a constant flow positive displacement pumping apparatusNALCO CHEMICAL CO·Filed 1991·Granted Mar 23, 1993·36 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →