Harry J Johnson

US Patent:

6428612, Aug 6, 2002

Filed:

Apr 19, 2001

Appl. No.:

09/837912

Inventors:

Steven McPhilmy - Frederick MD
Harry Johnson - Springfield VA
Ghassan Zamat - Germantown MD

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

B01D 5304

US Classification:

96132, 96135, 96139, 96152, 96153, 206 07

Abstract:

A hydrogen getter device includes a package made from a material that is hydrogen permeable and moisture impermeable. A preferred hydrogen getter is a particulate zeolite having a portion of its sodium ions exchanged by an activated metal, such as silver. The package can be a flexible enclosure made from the hydrogen permeable moisture impermeable sheet material and surrounded by a porous protecting material. In one embodiment, the package includes an internal wall to define a first enclosure containing the hydrogen getter and a second enclosure containing a moisture absorbing agent or desiccant, such as a zeolite. The package is suitable for use in electrical enclosures having an internal volume of about 5 liters to about 100 liters or more.

US Patent:

6836515, Dec 28, 2004

Filed:

Jul 23, 1999

Appl. No.:

09/360209

Inventors:

Stanley E. Kay - Rockville MD
Bala Subramaniam - Montgomery Village MD
Harry M. Johnson - Springfield VA
Donald S. Arnstein - Fairfax VA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H04L 2700

US Classification:

375260, 375261, 375269

Abstract:

A radio, and related methods of radio communication, consisting of a multi-modulation modem, wherein the multi-modulation modem that modulates and demodulates signals using a plurality of modulations. The radio also comprises a frequency converter coupled to the multi-modulation modem for converting the signals to a radio frequency and a transceiver unit including an antenna coupled to the frequency converter for transmitting the signals over a radio communications link. The multi-modulation modem includes a modulator that includes a modulation selector unit that selects respective ones of the plurality of modulations to modulate the signals. The multi-modulation modem also includes a demodulator for demodulating the signals having been modulated using the plurality of modulations.

US Patent:

57815380, Jul 14, 1998

Filed:

Jun 7, 1995

Appl. No.:

8/482273

Inventors:

Kalyan Ganesan - Germantown MD
Ranjan Pant - Gaithersburg MD
Victor Liau - Gaithersburg MD
Tayyab Khan - Germantown MD
Desmond Coughlin - Ijamsville MD
Harry Johnson - Springfield VA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H04J 300

US Classification:

370310

Abstract:

The present invention relates to a subscriber unit in a wireless personal communications system (WPCS). In one embodiment, the subscriber unit includes a digital dataport for modemless communication of digital signals. Another preferred embodiment provides for a subscriber unit having a cable television transport module for modulating and demodulating signals over unused bandwidth available on cable television lines.

US Patent:

56258895, Apr 29, 1997

Filed:

Jan 13, 1995

Appl. No.:

8/372510

Inventors:

Keerthilatha Chikkaswamy - Gaithersburg MD
Harry Johnson - Springfield VA

Assignee:

Hughes Electronics - Los Angeles CA

International Classification:

H04B 1702

US Classification:

455 671

Abstract:

A RF sniffer module and method for detecting the availability of cellular communication channels for data transmission. The module monitors the channels used in a cellular communication network to determine when a particular channel is idle, meaning it is not being currently used for communication. The module communicates the status of the channel to an overlay system. Thus, the overlay system is informed that a particular channel is idle and thus can be used for data transmission or that the channel is not available and thus the overlay system can not use that channel without interfering with the operation of the cellular communication network.

US Patent:

58129510, Sep 22, 1998

Filed:

Nov 23, 1994

Appl. No.:

8/344272

Inventors:

Kalyan Ganesan - Germantown MD
Ranjan Pant - Gaithersburg MD
Victor Liau - Gaithersburg MD
Robert Fischler - Gaithersburg MD
Kim Goh - Germantown MD
Barry Saunders - Frederick MD
Tayyab Khan - Germantown MD
Harry Johnson - Springfield VA
Desmond Coghlan - Ijamville MD

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H04J 300

US Classification:

455445

Abstract:

The present invention relates to a wireless personal communications system (WPCS) having several features embodied in several forms. In one embodiment, the, WPCS includes at least one RP, a first SU in communication with the RP, and a second SU in communication with the first SU through the RP without involving the RPC in the manner contemplated by the specification. The RP may preferably include a channel switching unit for connecting the first SU with the second SU without using any tariff lines to or from an RPC. Such an RP may be used as a component in a wireless PBX or Centrex system including ISDN based systems. Another preferred embodiment provides for a walkie-talkie option where the first SU communicates directly with the second SU, preferably over an unlicensed frequency. In another preferred embodiment, a plurality of SUs in communication with an RP may be accessed individually using a single dialed number.

US Patent:

57582947, May 26, 1998

Filed:

Jun 7, 1995

Appl. No.:

8/476848

Inventors:

Kalyan Ganesan - Germantown MD
Ranjan Pant - Gaithersburg MD
Victor Liau - Gaithersburg MD
Tayyab Khan - Germantown MD
Desmond Coughlin - Ijamsville MD
Harry Johnson - Springfield VA

Assignee:

Hughs Electronics Corporation - El Segundo CA

International Classification:

H04Q 720

US Classification:

455561

Abstract:

The present invention relates to a radio port in a wireless personal communications system. The radio port includes a first channel in communication with a first subscriber unit, a second channel in communication with a second subscriber unit, and a switching device connecting the first channel to the second channel so that the first subscriber unit may communicate directly with the second subscriber unit. In another preferred embodiment, the radio port includes a plurality of antennas, an RF receive section, an RF transmit section, an analog port adapted for connection to an analog telephone line, a digital dataport for receiving and transmitting digital signals, and a databus interconnecting the RF receive section, RF transmit section, analog port, and digital dataport. The RF receive section includes a diversity selection unit receiving an input signal from each of the antennas. The RF transmit section generates an output signal to be transmitted over at least one of the antennas.

US Patent:

20210392755, Dec 16, 2021

Filed:

Aug 30, 2021

Appl. No.:

17/460382

Inventors:

- Germantown MD, US
Peter HOU - Germantown MD, US
Taiwei YUE - Germantown MD, US
Brian CLOUGH - Germantown MD, US
Harry JOHNSON - Germantown MD, US
John CORRIGAN - Germantown MD, US

International Classification:

H05K 3/12
H05K 1/09
H05K 1/03
B33Y 80/00
B29D 11/00
B33Y 70/00
B41M 3/00
H01Q 15/24

Abstract:

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for producing meander-line polarizers. In some implementations, a meander-line polarizer includes a dielectric substrate made of a polyester polymer material and meander-line arrays formed on a surface of the dielectric substrate. Each meander-line array includes a sequence of alternating perpendicular conductive traces that are formed the surface of the dielectric substrate by applying conductive ink to the surface of the dielectric substrate using a template that defines a location and dimensions of each conductive trace of each meander-line array.

US Patent:

20210151869, May 20, 2021

Filed:

Nov 15, 2019

Appl. No.:

16/685986

Inventors:

- Germantown MD, US
Peter HOU - Gaithersburg MD, US
Taiwei YUE - Germantown MD, US
Brian CLOUGH - Germantown MD, US
Harry JOHNSON - Germantown MD, US
John CORRIGAN - Germantown MD, US

Assignee:

HUGHES NETWORK SYSTEMS, LLC - Germantown MD

International Classification:

H01Q 1/38
H05K 3/40
H05K 1/03
H05K 1/11
H05K 1/02
H01Q 1/48
H01Q 9/04

Abstract:

An apparatus and method for producing a low loss printed circuit board (PCB). The PCB includes an antenna patch, a ground plane, and a polarizer. The antenna patch consists of a plastic base having a first plurality of circuit patterns formed directly on its top surface. The ground plane is formed directly on a bottom surface of the plastic base used for the antenna patch, and contains one or more coupling circuit patterns. A polarizer spacer is provided on the antenna patch to provide separation from the polarizer. The polarizer also consists of a second plastic base having a second plurality of circuit patterns formed directly thereon.