Patents by Inventor Bernard A. Tilson

Bernard A. Tilson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Range extender with variable gain for coin telephone loops
    Patent number: 4323733
    Abstract: A range extender with gain unit for coin telephone loops is disclosed. When coin control signals to be applied from a central office to the coin loop are detected, an amplifier circuit and a line feed circuit connected to the loop are disconnected thereby directly connecting the central office with the coin telephone. After coin control is completed, the amplifier and line feed circuit are reinserted into the coin loop. Coin tests and off-hook detection are aided by the use of circuits which draw current from the central office.
    Type: Grant
    Filed: November 28, 1980
    Date of Patent: April 6, 1982
    Assignee: Bell Telephone Laboratories, Inc.
    Inventors: Henry W. Ott, Bernard A. Tilson
  • Telephone ringing extender
    Patent number: 4144408
    Abstract: A telephone ringing extender is shown which includes a ringing signal detector and a switch. In response to ringing signals, the ringing extender grounds the tip conductor to operate telephone ringers bridged on the loop. Protection against excessive voltages and excessive currents is also provided.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: March 13, 1979
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Roger E. Holtz, Bernard A. Tilson, Gordon D. Woods