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. 11, 1997
Filed:
Nov. 03, 1995
Applicant:
Inventor:
Kenneth D Simmons, Lincoln, NE (US);
Assignee:
Centurion International, Inc., Lincoln, NE (US);
Primary Examiner:
Int. Cl.
CPC ...
H01Q / ;
U.S. Cl.
CPC ...
343702 ; 343895 ; 343850 ;
Abstract
A retractable antenna for use with a communications device such as a cellular telephone is described and which may be moved from a fully extended position to a fully retracted position with respect to the telephone housing. The telephone circuitry utilizes a matching circuit to match a high impedance when the antenna is in the extended position. When the antenna is in the retracted position, it changes from a series resonance circuit to a parallel resonance circuit so that it may match the low impedance.