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| Number | Title | Issue Date |
| 6868981 | Light weight hydrogen tank A light weight fuel tank for a hydrogen powered airplane used as a platform for communication repeaters for communication services. An outer spherical shell member of a sandwich configuration surrounds an inner thin walled spherical shell member in which the liquid ... | 03/22/2005 |
| 6819849 | Intrusion detection system for secure fiber optics Methods and apparatus are disclosed for an intrusion detection system for secure fiber optic communication systems. A guard signal is transmitted over the optical fiber communication link and both the modal power and modal phase delay of this signal are monitored. I... | 11/16/2004 |
| 6807397 | Method for identifying growth limits of handheld services for mobile satellite communications Methods for increasing the efficiency of satellite constellation operations are disclosed. The steps of the present invention comprise calculating the maximum number of communications signals that each satellite in the satellite constellation can generate, determini... | 10/19/2004 |
| 6766987 | Satellite system and method of deploying same A satellite communication system has a first deployment of a plurality of satellites deployed in a medium earth orbit and two later deployments of a plurality of satellites deployed in the medium earth orbit. The first deployment is spaced so that the second deploym... | 07/27/2004 |
| 6741575 | Apparatus and method for efficient delivery of multicast data over personal access communications system (PACS) A method, apparatus, article of manufacture, and a memory structure for multicasting data in a cellular personal access communication system is disclosed. The method comprises the steps of allocating a multicast packet terminal identifier to a multicast group when a... | 05/25/2004 |
| 6735437 | Communication system employing reuse of satellite spectrum for terrestrial communication A terrestrial communication system using satellite uplink and downlink frequencies is disclosed. A terrestrial cell site produces a signal at a satellite uplink frequency that is transmitted to a terrestrial user terminal. The terrestrial cell site receives a signal... | 05/11/2004 |
| 6725013 | Communication system having frequency reuse in non-blocking manner A communications system (10) and method of operating the communications system includes a high altitude communication device (12) that communicates with a plurality of user terminals and a gateway station (30). The gateway station (30) co... | 04/20/2004 |
| 6711398 | Radio signal broadcast system and method A first transmitting device is used to transmit a first signal on a first carrier frequency to a relay device. The relay device receives the signal by demodulating the first carrier frequency. Subsequently, the relay device retransmits the signal by modulating a sec... | 03/23/2004 |
| 6708029 | Broadband communication system for mobile users in a satellite-based network A satellite-based communications system operating at high data rates includes a plurality of satellites each having uplink and downlink antennas for transmitting and receiving a plurality of signals utilizing a plurality of spot beams to and from a plurality of cove... | 03/16/2004 |
| 6707800 | ATM network with central call processor An ATM network comprises a central call processor, and one or more remotely located ATM bridge nodes, whereby the call processor is separated from the switching fabric in the ATM bridge nodes. A plurality of preestablished permanent virtual paths are defined within ... | 03/16/2004 |
| 4854677 | Interferometric/feedback spatial light modulation system and method A spatial light modulator and associated method are disclosed which achieve an intensity-to-intensity spatial transformation between a noncoherent input beam and a coherent output beam. An intermediate intensity-to-phase modulator provides a coherent, spa... | 08/08/1989 |
| 4800281 | Compact penning-discharge plasma source A compact, quick-igniting, and high-efficiency Penning-discharge type plasma source which comprises a cathode means for thermionically emitting electrons; an electron emission means disposed inside the cathode; anode means defining a discharge space, for ... | 01/24/1989 |
| 4768864 | Liquid-crystal-based optical power limiter A broad-band optical light detector having a detector cell, a system for focusing light on the cell, and a liquid crystal positioned in the light path, the liquid crystal being prepared so that it passes light along the light path in the normal operating ... | 09/06/1988 |
| 4750153 | Associative holographic memory apparatus employing phase conjugate mirrors and a two-wave mixing contra-directional coherent image amplifier Associative holography memory apparatus is disclosed which employs a hologram, two phase conjugate mirrors, and a two-wave mixing contra-directional coherent image amplifier. The mirrors and amplifier are arranged to form a conjugate resonator whereby the... | 06/07/1988 |
| 4745546 | Column shorted and full array shorted functional plane for use in a modular array processor and method for using same A column shorted and full array shorted functional plane for simultaneously transferring, or shorting, data to and from the data exchange subsystems of the array processor. This functional plane nominally includes an array of pseudo-modules that architect... | 05/17/1988 |
| 4745617 | Ideal distributed Bragg reflectors and resonators A method of optimizing the design of waveguide reflector surfaces for high-Q cavities. The method assumes ideal conducting surfaces and proceeds from simple planar waveguide systems which are compatible with resonant standing waves to the development of t... | 05/17/1988 |
| 4710477 | Method for forming latch-up immune, multiple retrograde well high density CMOS FET A high density CMOS device structure that is essentially immune to latch-up, and a method of fabricating the structure, is described. This is obtained by providing a well region within and adjacent a surface of a substrate, the well region having a multip... | 12/01/1987 |
| 4708431 | Fiber optic solderable bulkhead fitting Fiber optic solderable bulkhead fitting has a plated-on built-up metal body of a material which minimizes local stresses thereby minimizing microbending losses in the optical fiber. The body is sealed by solder within an opening in a bulkhead to provide a... | 11/24/1987 |
| 4596945 | Modulator switch with low voltage control A cold-cathode, plasma discharge modulator switch is disclosed. A crossed-field discharge plasma supplied charge carriers for the switch. A dc magnetic field is employed to provide a highly localized cusp magnetic field near the cathode, so that gas ioniz... | 06/24/1986 |
