Inventor · disambiguated record
John C. Lahrman
Also filed as: LAHRMAN JOHN C
7 granted patents·64 citations·filing 1995–2013
83Inventor score
Top patents by PatentIndex Score
7 records- 0176US7017914B1Piston assembly and method of manufactureDANA CORP·Filed 2002·Granted Mar 28, 2006·17 cites·3 claims
- 0264US8047123B2Cooling gallery insert for a pistonMAHLE ENGINE COMPONENTS USA INC·Filed 2007·Granted Nov 1, 2011·5 cites·19 claims
- 0363US8403334B2Multi-rail piston ringLAHRMAN JOHN C·Filed 2009·Granted Mar 26, 2013·4 cites·11 claims
- 0457US7997185B2Piston ringMAHLE ENGINE COMPONENTS USA INC·Filed 2008·Granted Aug 16, 2011·1 cites·17 claims
- 0553US5794941APiston ring assemblyDANA CORP·Filed 1995·Granted Aug 18, 1998·20 cites·13 claims
- 0647US8986465B2Piston ring with localized nitrided coatingMAHLE INT GMBH·Filed 2013·Granted Mar 24, 2015·0 cites·9 claims
- 0746US5901963AGas nitrided taper faced keystone piston ring incorporating a sealing land and orientation grooveDANA CORP·Filed 1996·Granted May 11, 1999·17 cites·16 claims
Join the waitlist — get patent alerts
Get an alert when John C. Lahrman files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →