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:
Sep. 10, 1991
Filed:
Feb. 16, 1990
Applicant:
Inventors:
Gerald Roberts, Lynchburg, VA (US);
Samual Toliver, Rustburg, VA (US);
John U Daniels, Jr, Lynchberg, VA (US);
Assignee:
Ericsson GE Mobile Communications Inc., Lynchburg, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324727 ; 324652 ; 324649 ;
Abstract
A third case or manner of obtaining the four critical frequencies useful in accurately measuring coupled-dual resonator crystals, wherein both ports of the crystal structure are monitored, rather than a single port in the previously known cases. Here the B port, for example, is monitored with the A-side open-circuited or with a capacitor in parallel with it, and the A port is monitored with the B-side short-circuited.