Uncategorized
Inventor
Country: United Kingdom
Galvanic battery
Method of and apparatus for treating refractory ores
Friction drive mechanism
Galvanic battery
Method of and apparatus for treating refractory ores
LandOfFree
John Edward Preston 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 Edward Preston, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and John Edward Preston will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-P-265726