Uncategorized
Inventor
Filter for sound vibrations and a microphone and telephone...
Piezo-electric pick up
Stereophonic pick-up
Stereophonic pick-up
Stereophonic transducer
Apparatus for transmitting mechanical vibrations
Filter for sound vibrations and a microphone and telephone...
Pick-up
Pick-up element
Piezo-electric pick up
LandOfFree
Machiel de Vries does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Machiel de Vries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Machiel de Vries will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-P-36668