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:
Dec. 16, 1997
Filed:
Apr. 21, 1995
Kamran Khojasteh, Morgan Hill, CA (US);
Cidco Incorporated, Morgan Hill, CA (US);
Abstract
A method and system for transmitting text information using multifrequency signals is provided. A switching center transmits a first multifrequency signal indicating the start of a text transmission. A receiver unit receives the first multifrequency signal and prepares to receive text information. The switching center transmits to the receiver unit a second and third multifrequency signals after the first multifrequency signal. The second and third multifrequency signals contain information corresponding to a text character. The receiver unit receives the second and third multifrequency signals and determines the text character transmitted. The switching center transmits a fourth multifrequency signal to the receiver unit indicating the end of the text transmission.