Inventor · disambiguated record
John H. Walgren
Also filed as: WALGREN JOHN H
4 granted patents·63 citations·filing 1997–2002
77Inventor score
Top patents by PatentIndex Score
4 records- 0171US6832443B1Cutting chainCHARLES MACHINE WORKS·Filed 2002·Granted Dec 21, 2004·25 cites·44 claims
- 0243US6684538B2Cutting tooth for a trencher chainVERMEER MFG CO·Filed 2001·Granted Feb 3, 2004·4 cites·11 claims
- 0343US6154987ACutting tooth for a trencher chainVERMEER MFG CO·Filed 1998·Granted Dec 5, 2000·17 cites·22 claims
- 0439US6014826AChain for trencher apparatusFiled 1997·Granted Jan 18, 2000·17 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →