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| Number | Title | Issue Date |
| 8096070 | Truck and wall banner holding frame A frame for attachment to a truck panel or a wall for holding a banner having a top base plate, a left side base plate, a right side base plate, and a bottom base plate. After the top of the banner is aligned and duct taped to the top base plate, the banner can be a... | 01/17/2012 |
| 8093831 | Voltage converter with first push A boost DC/DC power converter is disclosed that has a low voltage source, an inductor and a switching device that forms a series loop, a diode in series with a capacitor coupled across the switching device, a voltage divider coupled across the capacitor and a pulse ... | 01/10/2012 |
| D511235 | Surburban mail box with checkered race car flag | 11/01/2005 |
| D507444 | Patterned elongated shower floor mat having extended wings | 07/19/2005 |
| 6697031 | Antenna A multi-band radial horn antenna is disclosed that has a precision 50 ohm feed air line to ensure a match to a 50 ohm transmission line. The feed probe of the antenna has a threaded section that allows the antenna to be tuned quickly and precise in the fi... | 02/24/2004 |
| 6658191 | Overlay for telecommunications distribution frame The present invention is a flexible plastic membrane which supports embedded components such as light emitting diodes and plastic pressure switches, and conductors on a plastic ribbon which connects the embedded light emitting diode and plastic pressure s... | 12/02/2003 |
| 6501897 | Overlay for telecommunications distribution frame The present invention is a flexible plastic membrane which supports embedded components such as light emitting diodes and plastic pressure switches, and conductors on a plastic ribbon which connects the embedded light emitting diode and plastic pressure s... | 12/31/2002 |
| 6215638 | Overload protection assembly The input resistance of an electrical protective device connected to protect telecommunication transmission lines and associated telecommunication equipment is reduced by connecting a resistor in parallel with the coil of resistance wire of a heat coil. T... | 04/10/2001 |
| 5420868 | Suppression of brillouin scattering in lightwave transmission system Optical nonlinear effects, such as stimulated (Brillouin) scattering, cause disproportionate attenuation of transmitted optical signals and usually occurs only when the optical power exceeds a certain level. One of the most important types of nonlinear sc... | 05/30/1995 |
| 5367586 | Optical delay line A variable optical delay line which can delay an optical signal by a selected interval of time comprises an input wavelength router connected to an output wavelength router by means of optical waveguides of different lengths. A wavelength shifter coupled ... | 11/22/1994 |
| 5311346 | Fiber-optic transmission polarization-dependent distortion compensation The polarization-dependent distortion of an optical signal transmitted through an optical fiber is reduced by aligning the polarization of the optical signal to minimize the received signal distortion. A polarization controller (a device which can change ... | 05/10/1994 |
| 5278689 | Gigabit per-second optical packet switching with electronic control Currently, with optical time division multiplexing, a switching node is operated at the peak transmission rate. For example, if the data transmission rate is 10 Gbps, the line cards in the switching circuit are also required to operate at this rate despit... | 01/11/1994 |
| 5253314 | Tunable optical waveguide coupler Various optical functions are generated in accordance with the present invention of a novel broadly tunable monolithic wavelength selective coupler which can be integrated with a gain medium to form a broadly tunable laser. The tunable wavelength selectiv... | 10/12/1993 |
| 5243672 | Planar waveguide having optimized bend In an embodiment, an N×N integrated optical interconnection apparatus capable of switching, multiplexing or demultiplexing a large number of input and output wavelength channels achieves low levels of crosstalk and insertion loss. Two substantially ident... | 09/07/1993 |
| 5136263 | Harmonic oscillator This invention relates to an oscillator for overtone operations which has reduced parts count and improved performance. More specifically, a new improved Pierce type of harmonic oscillator is disclosed which eliminates the need for additional bias circuit... | 08/04/1992 |
| 5134671 | Monolithic integrated optical amplifier and photodetector An optical amplifier and photodetector are monolithically integrated, with the photodetector being optically coupled to the optical amplifier through a low radiative loss and low back reflectivity branching waveguide. Because of the low reflectivity, the ... | 07/28/1992 |
| 5115338 | Multi-stage optical amplifier This invention relates to an Erbium-doped fiber amplifier having multiple stages of amplification for providing enhanced performance. More specifically, optical means is located intermediate first and second stages of doped optical amplifying fibers adapt... | 05/19/1992 |
| 5101400 | Dynamic circuit identifier The implementation of BRI/ISDN services is changing the way services can be maintained with existing operations support systems. For example, with ISDN a subscriber to the service can initiate and effect a move of his director or telephone number from one... | 03/31/1992 |
| 5095381 | Passive tap network A communications network is implemented utilizing a transmission medium and a plurality of Network Interface Units passively coupled thereto. Communications among a first set of Network Interface Units is implemented on a predetermined channel in a first ... | 03/10/1992 |
| 5088095 | Gain stabilized fiber amplifier In this invention an optical fiber doped with a rare earth element and coupled to be pumped with a laser is coupled to an optical feedback loop. The feedback loop couples the output signal of the fiber amplifier to the input of the fiber amplifier. A narr... | 02/11/1992 |
| 5078468 | N×N optical star coupler This invention is a highly efficient star coupler for use with single mode waveguides. In the inventive coupler, all of the input waveguides and all of the output waveguides are assembled to form two separate bundles. The two bundles are axially aligned w... | 01/07/1992 |
| 5077728 | Frequency division multiple access network An N×N passive star coupler can be used to provide a high performance optical data network to interconnect many users at gigabit rates. Ignoring excessive losses, a signal incident on any input port is divided equally between all of the output ports. The... | 12/31/1991 |
| 5063585 | Telephone subscriber line fault detector The present invention relates to a method for distinguishing between an open conductor and a proper termination of a telephone subscriber loop which is terminated with a telephone which does not conform to the ringer-equivalence standard of the FCC Rules.... | 11/05/1991 |
| 5055795 | Traveling wave type transversal equalizer A transversal equalizer is realized by employing variable gain and delay in the amplification branches of a traveling wave amplifier. Specifically, by adjusting the gain and delay in each branch, the traveling wave type transversal equalizer may be adjust... | 10/08/1991 |
| 5050949 | Multi-stage optical fiber amplifier In this invention there is disclosed a multi-stage optical fiber amplifier for providing a new functon, that of gain equalization. The disclosed multi-stage optical fiber amplifier comprises at least two stages of amplification where each stage comprises ... | 09/24/1991 |
| 5040033 | Optical amplifier-photodetector assemblage Briefly, in the invention a photodetector and an optical amplifier are integrated in the same semiconductor chip. The optical amplifier and the photodetector are positioned side-by-side on the same chip. A portion of the electromagnetic energy carried in ... | 08/13/1991 |
| 5039993 | Periodic array with a nearly ideal element pattern A waveguide array comprising a plurality of waveguides which are each outwardly tapered at the aperture of the array in accordance with a predetermined criteria chosen to increase waveguide efficiency. The tapering serves to gradually transform a fundamen... | 08/13/1991 |
| 5040111 | Personal computer based non-interactive monitoring of communication links The present invention utilizes hardware and/or software, in combination with a personal computer and its peripheral devices (i.e., storage media, peripheral control, video display and the like) to monitor communication links. The personal computer, to ope... | 08/13/1991 |
| 5037180 | Optical filter on optical fiber end face In this invention there is disclosed an optical filter disposed on an optical fiber. More specifically, a filter comprised of a multilayer thin-film stack of low and high index of refraction material is deposited onto the end of an optical fiber. The filt... | 08/06/1991 |
| 5029297 | Optical amplifier-photodetector device The device here disclosed comprises an optical amplifier coupled to direct optical energy into a passive waveguide for transmission through the waveguide to its other end. A photodetector, positioned relative to the passive waveguide, detects the presence... | 07/02/1991 |
| 5028892 | Analog phase shifter An analog voltage-controlled phase shifter is disclosed which is smaller in size and provides a larger phase shift for a smaller change of capacitance of presently available voltage controlled phase shifters. These unexpected advantages are obtained by us... | 07/02/1991 |
| 5027435 | Optical communication systems using Fabry-Perot cavities One aspect of the invention is a Fabry-Perot cavity which has in part a waveguiding portion and in part a nonwaveguiding portion. In this manner, a cavity is constructed whose length would be too short to manipulate effectively if it were comprises exclus... | 06/25/1991 |
| 5027079 | Erbium-doped fiber amplifier This invention relates to an Erbium doped fiber amplifier having improved operating characteristics. Parameters which determine the operating characteristics of an erbium doped fiber amplifier are the concentration of erbium in the core of a fiber; the ra... | 06/25/1991 |
| 5005175 | Erbium-doped fiber amplifier This invention is a rare earth doped optical amplifier with increased gain and lowered pump thresholds. The amplifying scheme is based on a 3 level lasing system rather than the more prevalent 4 level lasing system. Additionally, the transmission mode of ... | 04/02/1991 |
| 4999694 | Photodiode In this invention, there is disclosed a new photodiode which comprises a semimetal/semiconductor junction. Distortion of the bands associated with this type of junction result in current flow when an electron hole pair is formed by, for example, a photon ... | 03/12/1991 |
| 4995815 | Coaxial transmission line to strip line coupler In accordance with the principles of the present invention, a connector for coupling a coaxial transmission line to a strip transmission line comprises a length of transmission line having an inner conductor having a longitudinal axis, an annular ring of ... | 02/26/1991 |
| 4982325 | Applications processor module for interfacing to a database system The present invention relates to a technique for interfacing a plurality of remote terminals, as, for example, Craft Access Terminals (CATs), directly to a central database in a system, such as, for example, a Craft Access System, without interfacing with... | 01/01/1991 |
| 4973120 | Optical isolator with resonant cavity having gyrotropic material The invention is an optical isolator. In one embodiment the optical isolator comprises two linear polarizers, one at the input of the isolator and the other at the output. Positioned between the input and the output linear polarizer is a gyrotropic medium... | 11/27/1990 |
| 4970717 | Photonic local/metropolitan area network With this invention, collisions of optical packets in local area networks are avoided. Briefly, each branch of a local area network topology, such as a star, a ring or a bus is provided with an optical path having two substantially parallel optical fibers... | 11/13/1990 |
| 4963832 | Erbium-doped fiber amplifier coupling device This invention is directed toward reducing substantially the loss incurred when two optical fibers of different mode diameters are coupled together. In this invention, the coupling of one fiber to that of another where the fibers are of different mode dia... | 10/16/1990 |
