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. 14, 1995
Filed:
Jan. 14, 1992
Chung H Park, Dobong-gu, Seoul, KR;
Other;
Abstract
A telephone communication enable state maintaining circuit is disclosed, and the circuit includes a communication circuit 10, a communication operating circuit 20 and an operation maintaining circuit 30. The communication circuit 10 includes contacts 3,4,5, and a condenser C.sub.1. The communication operating circuit 20 includes a resistor r.sub.1, a condenser C.sub.2, a transistor 6 and contacts R.sub.3 a, R.sub.3 b, R.sub.1 a, R.sub.1 b. The operation maintaining circuit 30 includes contacts R.sub.1 c, R.sub.3 c, a resistor r.sub.2, a condenser C.sub.3, and a transistor 7. According to the present invention, telephone calls from the outside can be received, even if the telephone receiver is placed in an abnormal manner.