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.)
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki Co Ltd
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
Priority claimed from JP46101757Aexternal-prioritypatent/JPS4866487A/ja
Priority claimed from JP46101756Aexternal-prioritypatent/JPS4866486A/ja
Application filed by Tokyo Keiki Co LtdfiledCriticalTokyo Keiki Co Ltd
Publication of FR2163639A1publicationCriticalpatent/FR2163639A1/fr
Application grantedgrantedCritical
Publication of FR2163639B1publicationCriticalpatent/FR2163639B1/fr
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
G01N29/04—Analysing solids
G01N29/11—Analysing solids by measuring attenuation of acoustic waves