The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 1987
Filed:
Jun. 10, 1985
Jean-Marie Nicolas, Saint-Maur, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
An apparatus for examining objects by ultrasonic echography comprising an ultrasonic transmitting transducer (10) and an ultrasonic receiving transducer (20), with which are associated a transmitter stage (30), a receiver stage (40) constituted by a channel (100) for processing the echo signals reflected to the receiving transducer by the obstacles they meet in the said region and a storage and/or visualization stage (60), characterized in that the transmitting transducer (10) is at the same time a receiver and in that the receiver stage (40) also comprises a channel (200) for processing the output signals of the said transmitting/receiving transducer (10) thus formed and a subtraction device (500), whose output is connected to a first input (560) of the storage and/or visualization stage and whose two inputs receive the output signals of the said channels (100) and (200) representative of the real and theoretical travelling times, respectively, between the transducers.