Inventor · disambiguated record

John W. Koupal

Also filed as: KOUPAL JOHN W

1 granted patent·32 citations·filing 1991–1991

45Inventor score

Technology areasF01N

Files withUS ENVIRONMENT1

Top patents by PatentIndex Score

1 record

0155US5228335AMethod and apparatus for detection of catalyst failure on-board a motor vehicle using a dual oxygen sensor and an algorithmUS ENVIRONMENT·Filed 1991·Granted Jul 20, 1993·32 cites·10 claims

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