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:
Dec. 30, 1980
Filed:
Mar. 02, 1979
Applicant:
Inventors:
Donald F Specht, Los Altos, CA (US);
Julian Dow, Mountain View, CA (US);
Assignee:
Smith Kline Instruments, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73626 ; 128660 ; 367103 ; 367105 ;
Abstract
An ultrasonic transducer assembly and system including a disc-shaped transducer element surrounded by ring-shaped transducer elements of different width to permit dynamic focusing and minimum phase cancellation. The elements are switched so that the output signals for various depths have a small dynamic range whereby the dynamic range of associated amplifiers is significantly reduced.