Inventor · disambiguated record
Andrew Ritchie
Also filed as: RITCHIE ANDREW · RITCHIE ANDREW J D · RITCHIE ANDREW JAMES · RITCHIE ANDREW JAMES DALZIEL
11 granted patents·397 citations·filing 1991–2001
92Inventor score
Top patents by PatentIndex Score
11 records- 0191US6004910ACrankcase lubricant for modern heavy duty diesel and gasoline fueled enginesEXXON CHEMICAL PATENTS INC·Filed 1995·Granted Dec 21, 1999·67 cites·14 claims
- 0291US5232614ALubricating oil compositions and additives for use thereinEXXON CHEMICAL PATENTS INC·Filed 1991·Granted Aug 3, 1993·62 cites·22 claims
- 0387US5719107ACrankcase lubricant for heavy duty diesel oilEXXON CHEMICAL PATENTS INC·Filed 1996·Granted Feb 17, 1998·41 cites·14 claims
- 0482US6873689B1Voice processing systemIBM·Filed 2000·Granted Mar 29, 2005·31 cites·20 claims
- 0577US6282268B1Voice processing systemIBM·Filed 1997·Granted Aug 28, 2001·82 cites·16 claims
- 0673US6272146B1Bus connection set up and tear downIBM·Filed 1997·Granted Aug 7, 2001·47 cites·21 claims
- 0762US6055306ASuppression of call answer supervision in a telephone network by an intelligent peripheralIBM·Filed 1997·Granted Apr 25, 2000·25 cites·14 claims
- 0859US6163535ADistributed voice processing systemIBM·Filed 1997·Granted Dec 19, 2000·33 cites·10 claims
- 0954US6724751B1Distributed voice processing systemIBM·Filed 2000·Granted Apr 20, 2004·2 cites·21 claims
- 1043USRE39648ECrankcase lubricant for heavy duty diesel oilINFINEUM USA LP·Filed 2001·Granted May 22, 2007·0 cites·14 claims
- 1141US6205134B1Voice processing systemIBM·Filed 1997·Granted Mar 20, 2001·7 cites·19 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →