Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PUYO LACLAUSTRA
Original Assignee
PUYO LACLAUSTRA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PUYO LACLAUSTRAfiledCriticalPUYO LACLAUSTRA
Priority to ES364531ApriorityCriticalpatent/ES364531A1/en
Publication of ES364531A1publicationCriticalpatent/ES364531A1/en
Internal telephony system, characterized by having two amplification plates of different gains, whose two inputs can be attacked by independent two-wire lines, by the signal of a speaker used as a microphone and the output in one of them is low level, capable of reproduce the sounds in one or several speakers used as headphones, while the other is of a higher level to reproduce the sounds in one or several speakers so that they can be heard at a certain distance. (Machine-translation by Google Translate, not legally binding)
ES364531A1969-03-081969-03-08Internal telephone system. (Machine-translation by Google Translate, not legally binding)
ExpiredES364531A1
(en)