Patents by Inventor Henry W. Ott

Henry W. Ott 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