Telephonic communications
Call signal generating
Inventor
active
Audio superpositioning
Combine audio and ringing mode
No associations
LandOfFree
Klaus Graef does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Klaus Graef, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Klaus Graef will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-2814693