Telephonic communications
Centralized switching system
Switching controlled in response to called station...
Inventor
active
No associations
LandOfFree
Theodore Heeren does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Theodore Heeren, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theodore Heeren will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-2784322