Inventor · disambiguated record
John Pietrangelo
Also filed as: PIETRANGELO JOHN
5 granted patents·66 citations·filing 1991–2004
79Inventor score
Technology areasD21C
Top patents by PatentIndex Score
5 records- 0189US5617975AChip feed systemAHLSTROM MACHINERY INC·Filed 1995·Granted Apr 8, 1997·36 cites·20 claims
- 0275US6129816ATapered screen assembly for a cellulose pulp digesterANDRITZ AHLSTROM INC·Filed 1997·Granted Oct 10, 2000·16 cites·20 claims
- 0365US6375796B1Method of treating material in a continuous digesterANDRITZ INC·Filed 2000·Granted Apr 23, 2002·2 cites·17 claims
- 0454USRE39208EMethod of treating material in a continuous digesterANDRITZ INC·Filed 2004·Granted Aug 1, 2006·0 cites·28 claims
- 0554US5567279AVariable stage pressure diffuserAHLSTROM MACHINERY INC·Filed 1991·Granted Oct 22, 1996·12 cites·21 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →