Inventor · disambiguated record

Derrill J. Koelz

Also filed as: KOELZ DERRILL J

1 granted patent·2 citations·filing 2019–2019

18Inventor score
Technology areasB61L
Files withPROGRESS RAIL SERVICES CORP1

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1 record

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