Mobile phone having a detachable keypad and the detachable...

Details Mobile phone having a detachable keypad and the detachable... Mobile phone having a detachable keypad and the detachable...

2006-02-14

2006-02-14

Chiang, Jack (Department: 2642)

Telephonic communications

Terminal accessory or auxiliary equipment

Including coupler

C379S430000, C379S433070

Reexamination Certificate

active

06999586

ABSTRACT:
Disclosed are a detachable keypad and a mobile phone with the detachable keypad. The detachable keypad includes an earphone-microphone jack, a key array, and a DTMF generator. When a key is pressed while an earphone plug is inserted into the earphone-microphone jack, a DTMF signal corresponding to the pressed key is transmitted to a microphone of a mobile phone through an earphone-microphone speaker. In the mobile phone, an earphone-microphone speaker fixing portion fixes an earphone-microphone speaker at a position suitable for a microphone to receive sound from the earphone-microphone speaker. An audio/DTMF separator separates a signal received at the microphone into an audio signal and a DTMF signal. A controller analyzes the DTMF signal and performs an operation according to the analysis result.

REFERENCES:
patent: 3757048 (1973-09-01), McAvoy et al.
patent: 5561710 (1996-10-01), Helms
patent: 5812659 (1998-09-01), Mauney et al.
patent: 6149116 (2000-11-01), Won

Affiliated with

Also associated with

Rating

Mobile phone having a detachable keypad and the detachable... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mobile phone having a detachable keypad and the detachable..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobile phone having a detachable keypad and the detachable... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3627367