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:
Jul. 20, 1976
Filed:
Dec. 03, 1974
Danny E Ross, Plantation, FL (US);
James M Mueller, Margate, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
This apparatus is especially useful as a conversion kit and includes a new front cover for a portable radio telephone having a plurality of push buttons mounted therein, which push buttons activate a tone generator, the tones from which are applied to a timer and through a multi-contact relay to the speaker and transmitter of the radio telephone. The timer is utilized to activate the relay for 90 milliseconds each time a tone is produced by the tone generator so that a tone is transmitted for only 90 milliseconds and when a tone is not being generated the transmitter is connected to a microphone and the speaker is connected to the receiver in the normal operating manner by the relay.