Inventor

LAHRMAN JOHN C

US7 patents

⚠️ This page may combine multiple inventors who share the name “LAHRMAN JOHN C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

DANA CORP

3 patents

US5794941AAug 18, 1998

Piston ring assembly

DANA CORP20 citations90

US7017914B1Mar 28, 2006

Piston assembly and method of manufacture

DANA CORP17 citations77

US5901963AMay 11, 1999

Gas nitrided taper faced keystone piston ring incorporating a sealing land and orientation groove

DANA CORP17 citations77

MAHLE ENGINE COMPONENTS USA INC

2 patents

US8047123B2Nov 1, 2011

Cooling gallery insert for a piston

MAHLE ENGINE COMPONENTS USA INC5 citations57

US7997185B2Aug 16, 2011

Piston ring

MAHLE ENGINE COMPONENTS USA INC1 citations47

LAHRMAN JOHN C

1 patent

US8403334B2Mar 26, 2013

Multi-rail piston ring

LAHRMAN JOHN C4 citations54

MAHLE INT GMBH

1 patent

US8986465B2Mar 24, 2015

Piston ring with localized nitrided coating

MAHLE INT GMBH0 citations39