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:
Feb. 21, 1984
Filed:
Aug. 28, 1981
Applicant:
Inventors:
Gerald E Roberts, Lynchburg, VA (US);
Alfred G Staples, Evergreen, VA (US);
Assignee:
General Electric Company, Lynchburg, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H / ; H03H / ;
U.S. Cl.
CPC ...
333189 ; 333192 ; 29 2535 ;
Abstract
A crystal filter structure and fabrication method therefor. The crystal filter is constructed as a thick film circuit on a ceramic substrate. The coupling capacitors are painted on the ceramic substrate as part of the thick film circuit. The capacitors are laser trimmed to precise tolerance in order to provide a crystal filter having precise characteristics.