Patents Assigned to I & T Tech Co., Ltd.
  • Sound recognition theft prevention system
    Patent number: 10049547
    Abstract: The present invention includes a self-sounding theft prevention tag that issues one of two different sounds, that is, a first alarm or a second alarm in the event of theft, so that an abnormal state where a theft has occurred is detected with sound in a remote location without being interrupted by electromagnetic noise.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: August 14, 2018
    Assignee: I & T TECH CO., LTD.
    Inventors: Renshiro Ishino, Katsuhiko Asada
  • Alarm sound detection device
    Patent number: 9536400
    Abstract: By detecting the specific frequency component included in an alarm sound by a frequency analysis and a period analysis, even under a noisy and echo environment, a reliable, almost-no-false-detecting and small-sized abnormality detection device, which can detect the alarm sound, can be realized and then an integrated security system can be realized.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: January 3, 2017
    Assignee: I & T Tech Co., Ltd.
    Inventor: Katsuhiko Asada