The present invention relates to a method and a transmitter/receiver for transferring signals through a medium in pipes or hoses, whereby at a transmitter side pressure pulses are generated of various frequencies or in various frequency ranges, and for the purpose of providing a technology which eliminates...http://www.google.fr/patents/US5546359?utm_source=gb-gplus-shareBrevet US5546359 - Method and transmitter/receiver for transferring signals through a medium in pipes and hoses
Method and transmitter/receiver for transferring signals through a medium in ...
