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:
Jan. 30, 1990
Filed:
May. 27, 1988
Kaneyuki Nishihara, Abiko, JP;
Akinobu Tomimori, Kashiwa, JP;
Philip H Rittmueller, St. Charles, IL (US);
NEC Corporation, Tokyo, JP;
Abstract
An electronic device for generating an activation signal in response to detection of an acoustic signal having parameters within respective predetermined ranges, and then automatically dialing a prestored telephone number and transmitting a prerecorded message over the telephone line in response to the activation signal. The device includes a transducer for transducing an acoustic signal into an electrical signal; a detector for outputting an activation signal in response to detection of an acoustic signal having parameters within respective predetermined ranges; and a telephone module for automatically dialing a prestored number and transmitting a prerecorded message in response to the activation signal. The detected parameters include the amplitude of the acoustic signal, the frequency of the acoustic signal, the duration of each burst of the acoustic signal, and the duration of each interval between successive bursts of the acoustic signal.