Patents Assigned to South Tech Instruments, Inc.
  • Off-hook telephone clearing system
    Patent number: 5764752
    Abstract: An off-hook telephone clearing system for a telephone line having at least two telephones connected thereto, comprising a howler tone detector connected to each telephone, and a telephone disconnect device having an input responsive to the howler tone detector for disconnecting a telephone being in off-hook condition from the telephone line. The clearing system may include a latching relay in the disconnect device. The latching relay may be mechanically coupled to the telephone hookswitch for delatching upon hang-up of the receiver.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: June 9, 1998
    Assignee: South Tech Instruments, Inc.
    Inventors: Tyler E. Waite, Jeffrey M. Byrd