1
Francisco A Middleton, David A Zeller Jr: Single line telephone communication system. Alcatel USA, Peter C Van Der Sluys, April 11, 1989: US04821319 (108 worldwide citation)

A communication system for use with a single pair of externally provided telephone wires and a single pair of in-house wires for the provision of full intercom services and/or PABX type features to a plurality of subsets includes a line interface module connected between the single pair of externall ...


2
David A Zeller Jr: Apparatus for optimizing the charging of a rechargeable battery. ITT Corporation, Robert A Hays, Peter C Van Der Sluys, May 26, 1987: US04668902 (30 worldwide citation)

An apparatus for optimizing the charging of a rechargeable battery includes, in parallel with the rechargeable battery, a series of diodes selected to exhibit an effective impedance that is the inverse of the impedance of the rechargeable battery regardless of the ambient temperature.


3
Mark G Smith, Karen J French, David A Zeller Jr, Franklin Hargrave, Francisco A Middleton: Information collecting and forwarding apparatus. ITT Corporation, Robert A Hays, Peter C Van Der Sluys, March 31, 1987: US04654869 (14 worldwide citation)

An apparatus for collecting and forwarding encoded information includes a source of power maintained from the output port thereof to provide power to the source of encoded informations whereby a local subscriber is not required to supply power to such encoders via the AC mains to his premises.


4
Franklin Hargrave, David A Zeller Jr, Mark G Smith, William L Hull III, Francisco A Middleton: Test trunk access controller. ITT Corporation, Peter C Van Der Sluys, Robert A Hays, February 24, 1987: US04646342 (6 worldwide citation)

A test trunk access controller includes a test trunk interface controller accessed by a subscriber line assigned to a service provider, or other remote metering facility, and a test trunk interface device inter-connecting the test trunk controller with the test trunk device of a local telephone swit ...


5
Franklin Hargrave, Francisco A Middleton, David A Zeller Jr: Telephone line access apparatus. Alcatel USA, Peter C Van Der Sluys, November 1, 1988: US04782480 (4 worldwide citation)

A telephone line access apparatus includes a first stage for providing high voltage protection and a second stage filter in series with the first stage. The first and second stages are incorporated within a housing that is adapted to plug into an existing main distribution frame of a telephone centr ...


6
David A Zeller Jr, Francisco A Middleton, Franklin Hargrave: Line access apparatus for in-band communication. Alcatel USA Corporation, Peter C Van Der Sluys, June 7, 1988: US04750170

A line access apparatus for in-band communication includes a line coupler that functions as a high voltage isolation device and has a resonant frequency out of the signal transmission band. A carrier signal of about the resonant frequency is modulated at an in-band frequency to convey information ac ...