Patents by Inventor Karl E. Pommer, II

Karl E. Pommer, II 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).

  • Patent number: 4647787
    Abstract: A circuit arrangement for use in telephone instruments which require battery backup for memory retention and microprocessor operation during such procedures as pulse dial address signalling where no power can be supplied by the telephone subscriber's line. Bipolar solid state circuitry may be used to provide the necessary backup power supply during these periods.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: March 3, 1987
    Assignee: GTE Communication Systems Corp.
    Inventor: Karl E. Pommer, II
  • Patent number: 4634814
    Abstract: A fast response electronic switch used for control of connect and disconnect functions, primarily related to speech network applications for electronic-microprocessor based telephones utilizing dual tone multifrequency and/or universal pulse dial address signaling. Disclosed circuitry includes an active surge protector, a saturated transistor switch and bias circuit which exhibits a high AC impedance with respect to the telephone subscriber line.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: January 6, 1987
    Assignee: GTE Communication Systems Corp.
    Inventor: Karl E. Pommer, II
  • Patent number: 4613768
    Abstract: A precise temperature dependent voltage reference and voltage comparator comprising a three terminal circuit. When the input voltage exceeds a predetermined threshold, the output switches from the nonconducting, "off" state to a current conducting "on" state. The threshold condition can be tailored to a specific temperature characteristic and low voltage range with an input current on the order of 25 microamperes. With the output tied to the input, the circuitry can act as a reference diode.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: September 23, 1986
    Assignee: GTE Communication Systems Corp.
    Inventor: Karl E. Pommer, II
  • Patent number: 4609864
    Abstract: A voltage comparator with both analog and digital outputs. The analog output being useful to control a analog processer such as a voltage regulator while the digital output gives an indication of the controlled state. The present circuitry may be adapted as a lowcost means of adding microprocessor control to an ongoing process whose behavior is dependent upon the state of another parameter such as the voltage exhibited by a non-rechargeable battery supply.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: September 2, 1986
    Assignee: GTE Communication Systems Corp.
    Inventor: Karl E. Pommer, II
  • Patent number: 4598174
    Abstract: A technique for evaluating keypad conditions while utilizing only a minimum number of ports in a microprocessor involved in control of a telephone instrument. Because of the limited number of ports available and necessity to also evaluate conditions of mode selecting strap switches, the utilization of a reduced number of ports is highly desirable in such an enviroment. Such a reduction becomes an absolute necessity particularly in dealing in those enviroments that include random access memories, read only memories, pulse dialers, integrated circuits and liquid crystal displays. A combination of diode gating, resistive decoupling and time multiplexing techniques are used to match the input/output requirements to the available ports of a specific microprocessor.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: July 1, 1986
    Assignee: GTE Communication Systems Corp.
    Inventor: Karl E. Pommer, II
  • Patent number: 4532382
    Abstract: A power supply circuit for use in a subscriber's telephone that incorporates memory devices for use in repertory dialing, last number recall, and similar functions. This circuit interfaces with the telephone line to provide the data retention supply current needs of volatile static memory devices. It also interfaces with the power supply of the associated logic circuitry to supply the needed operating voltage.
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: July 30, 1985
    Assignee: GTE Automatic Electric Incorporated
    Inventor: Karl E. Pommer, II
  • Patent number: 4406927
    Abstract: An electronic tone ringer for use in a telephone instrument to respond to ringing currents to generate an output tone electronically is described. A controlled breakdown rectifier bridge is placed across the input line to produce a d.c. output in response to ring input. The d.c. output is fed to an oscillator to produce a signal which is fed to a piezo-electric transducer to produce output tones. A number of safeguards are built into the circuit to prevent random noises from being fed to the oscillator. Further, the controlled breakdown bridge provides voltage clamp action to prevent spikes of voltage from damaging the circuit.
    Type: Grant
    Filed: May 8, 1981
    Date of Patent: September 27, 1983
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Karl E. Pommer, II