Inventor · disambiguated record

Donald Hellmann

Also filed as: HELLMANN DONALD

1 granted patent·2 citations·filing 1987–1987

18Inventor score

Technology areasF23D

Files withVAILLANT JOH GMBH & CO1

Top patents by PatentIndex Score

1 record

0119US4915620ABurner, in particular atmospheric pre-mix gas burner, and cooling rods thereforVAILLANT JOH GMBH & CO·Filed 1987·Granted Apr 10, 1990·2 cites·24 claims

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