Inventor · disambiguated record

Isfried Petzenhauser

Also filed as: PETZENHAUSER ISFRIED

2 granted patents·8 citations·filing 1988–1989

48Inventor score

Technology areasC04B C09D

Files withBAYER AG1 BUCHTAL GMBH1

Top patents by PatentIndex Score

2 records

0136US4853167AMethod for making lead pencils and colored pencilsBUCHTAL GMBH·Filed 1988·Granted Aug 1, 1989·8 cites·11 claims
0223US4990473AZirconyl phosphate ceramics, a process for their production and their useBAYER AG·Filed 1989·Granted Feb 5, 1991·0 cites·12 claims

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