Railway switches and signals
Electric automatic highway signals, mine doors, and gates
Examiner
active
No affiliations
LandOfFree
Frautz Jules does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Frautz Jules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frautz Jules will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-380719