Telephonic communications
Centralized switching system
With generating of call associated substation signal
Inventor
active
No associations
LandOfFree
Robert R. Drzewiecki does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Robert R. Drzewiecki, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Robert R. Drzewiecki will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-1885132