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:
Oct. 20, 1987
Filed:
Aug. 08, 1986
Applicant:
Inventor:
Hans-Peter Grassl, Zorneding, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
3103 / ; 3103 / ; 333154 ; 333196 ;
Abstract
A dispersive transducer 100 which has non-equidistant distribution of the finger electrodes 6, 7, 16 and 17 according to band-width such that the finger electrodes 16 and 17 of the low frequency portion 11 of the transducer have a width c and spacing d1 (or d2) which are equal to the corresponding portions of the highest frequency part 13 of the transducer such that reflections are substantially reduced or eliminated.