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:
Feb. 15, 2005
Filed:
Oct. 03, 2003
Sang Chul Yoon, Kyungki-do, KR;
Duck Gu Jeon, Seoul, KR;
Jae Sik Jung, Seoul, KR;
Jae Hwan Kwon, Seoul, KR;
Sang Chul Yoon, Kyungki-do, KR;
Duck Gu Jeon, Seoul, KR;
Jae Sik Jung, Seoul, KR;
Jae Hwan Kwon, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
An air conditioner control system and method uses a PSTN (Public Switched Telephone Network). The system allows a remote control operator to control a plurality of air conditioners through the PSTN by providing receiving modules connected to the air conditioners which have unique IDs assigned thereto and which all use same telephone line. In an electronic device, a control program is driven to control and monitor the air conditioners. A transmitting module connected to the electronic device converts and codes a control command signal into a DTMF (Dual Tone Multi-Frequency) signal, and transmits the DTMF signal through the PSTN to a receiving module connected to a corresponding air conditioner, so that the air conditioner can be remotely controlled.