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:
Apr. 16, 2002
Filed:
Oct. 22, 1999
Seung Kil Kim, Chapel Hill, NC (US);
Ericsson Inc., Research Triangle Park, NC (US);
Abstract
A user terminal includes a first input device, such as a microphone, electrically coupled to a conductor, wherein the microphone applies an AC signal to the conductor in response to input thereto. A second input device is electrically coupled to the conductor, and the second input device applies one of a plurality of DC signals to the conductor in response to input thereto. A microphone signal can be coupled to the conductor, and automatically passed to or blocked from the conductor by DC level generated by the second input device. A DC detector circuit is coupled to the conductor, and the DC detector circuit determines the DC signal generated by the second input device. Related methods also are discussed.