Inventor · disambiguated record

Charles F. Sprague

Also filed as: SPRAGUE CHARLES F

2 granted patents·48 citations·filing 1998–1998

62Inventor score

Technology areasF16K Y10T

Files withGROTH CORP2

Top patents by PatentIndex Score

2 records

0173US5992449APilot operated safety relief valve adapted for low fluid pressuresGROTH CORP·Filed 1998·Granted Nov 30, 1999·42 cites·17 claims
0229US5931188ADiaphragm operated regulator valve for maintaining low gas pressureGROTH CORP·Filed 1998·Granted Aug 3, 1999·6 cites·12 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →