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:
Nov. 14, 2000
Filed:
Nov. 30, 1999
Applicant:
Inventors:
Thomas G Guyett, Gainesville, GA (US);
Michael H Reeves, Athens, GA (US);
Stephen B Hobbs, Kentwood, MI (US);
Assignee:
GTC Properties, Inc., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04B / ; G04C / ; G04C / ; G04C / ;
U.S. Cl.
CPC ...
368204 ; 368241 ; 368250 ;
Abstract
A transformerless LED digital display clock circuitry using AC line voltage as a primary source of power is disclosed. The AC line voltage is substantially reduced to around 10 volts or less and then rectified to provide DC power to the quartz analog clock. Also included is a NiCad battery circuitry used as a power backup and to allow for occasional but high current using devices. The LED digital display is made up of four separate 'digit' displays each independently controlled by four separate cathode outputs from a microprocessor.