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:
Aug. 01, 2000
Filed:
Dec. 31, 1997
John M Spall, Raleigh, NC (US);
Gerard J Hayes, Wake Forest, NC (US);
Howard E Holshouser, Efland, NC (US);
Ericsson Inc., Research Triangle Park, NC (US);
Abstract
Radiotelephones having retractable antenna systems include an antenna, a housing with a transceiver and user interface disposed therein and a non-radiating antenna feed coupled to both the antenna and the transceiver. The non-radiating feed is movably mounted within and extendible from the housing so as to have an extended position and a retracted position. In one embodiment, the antenna is physically supported by the non-radiating feed and is thus mounted in an extended state when the non-radiating feed is in an extended position. and is mounted in a retracted state when the non-radiating feed is in the retracted position. Preferably, the antenna exhibits approximately the same electrical length in both the extended and retracted states, and the antenna is substantially isolated from the housing of the radiotelephone when the antenna is in the extended state.