Inventor
CERWIN JOHN
US8 patents
⚠️ This page may combine multiple inventors who share the name “CERWIN JOHN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CERWIN JOHN
7 patentsUS7992311B2Aug 9, 2011
Rotary boring tool alignment and depth indication system
CERWIN JOHN57 citations95
US7447565B2Nov 4, 2008
Electronic alignment system
CERWIN JOHN56 citations95
US10739127B2Aug 11, 2020
Rotary boring tool alignment and depth indication tools
CERWIN JOHN3 citations70
US10150167B2Dec 11, 2018
Rotary boring tool alignment and depth indication system
CERWIN JOHN4 citations70
US7900368B2Mar 8, 2011
Train rail alignment and distance system
CERWIN JOHN4 citations60
US11571753B1Feb 7, 2023
Rotary boring tool alignment device and system
CERWIN JOHN1 citations59
US8069579B2Dec 6, 2011
Train rail alignment and distance system
CERWIN JOHN0 citations49