Uncategorized
Inventor
Cross head for steam engines
Cut-off for steam engines
Valve mechanism
Valve mechanism
No associations
LandOfFree
John J. Tonkin does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with John J. Tonkin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and John J. Tonkin will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-P-207052