Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4382238 | Band stop filter and circuit arrangement for common antenna In a band stop filter having a plurality of series resonating circuits, and coaxial cables connected between the series resonating circuits, the length of each of the coaxial cables is made either shorter or longer than quarter wavelength at the center fr... | 05/03/1983 |
| 4370630 | Isolating connector An isolating connector is disclosed for isolating the center conductor of a shielded cable from DC and low frequency AC potentials. The connector includes a generally tubular shell which is connected to the cable's shield and within which a connector pin ... | 01/25/1983 |
| 4361820 | Hybrid microwave circuit A coaxial type microwave filter having an outer conductor and at least one inner conductor supported in the outer conductor has a strip transmission line extending from an external strip-line circuit to the inner conductor through an opening in the outer ... | 11/30/1982 |
| 4354168 | Delay line canceler A source of pulse waves is coupled to a first transmission line and a second transmission line, the inputs of each line being parallely coupled. The input of the first line is in series with its characteristic impedance. The outputs of each line are serie... | 10/12/1982 |
| 4342972 | Microwave device employing coaxial resonator The disclosure relates to an improved microwave device which includes a casing of electrically conductive material, at least two coaxial resonators, for example, 1/4 wavelength coaxial TEM resonators each having dielectric member disposed between an inner... | 08/03/1982 |
| 4329667 | Coaxial cable low frequency band-pass filter The band-pass filter portion of a coaxial cable includes filter elements in the form of a laminate of dielectric material having a conductive layer on opposite faces. Attached to each conductive layer is a mass which is the electrical equivalent of a shun... | 05/11/1982 |
| 4318064 | Resonator for high frequency electromagnetic oscillations A resonator for a high frequency electromagnetic oscillator is disclosed. The resonator includes a hollow cylinder formed of a material having a low dielectric constant and a dielectric wire formed of a material having a higher dielectric constant and loc... | 03/02/1982 |
| 4307357 | Foreshortened coaxial resonators A coaxial-structure filter which utilizes a flat depression machined in the bottom surface of the filter cover as the resonant frequency determining element in a resonant cavity is disclosed. The depression is directly above the cavity resonator post when... | 12/22/1981 |
| 4296389 | Crimped coax reflective dispersive delay line A dispersive delay line and method for fabricating the delay line is described in which coaxial cable is utilized and in which the dispersive or bandpass characteristic is established by the crimping of the coaxial cable in such a manner that the axial cr... | 10/20/1981 |
| 4286238 | Harmonic filtering device for radio transmitter A harmonic filtering device placed in a high frequency line connecting a radio transmitter to its load with at least one cell in parallel on the line, constituted by an anti-resonant circuit (at the transmission frequency of the transmitter) in series wit... | 08/25/1981 |
| 4276525 | Coaxial resonator with projecting terminal portion and electrical filter employing a coaxial resonator of that type The disclosure relates to an improved coaxial resonator and an electrical filter employing such coaxial resonators. The electrical filter includes a casing of electrically conductive material, at least more than one coaxial resonators, for example, 1/4 wa... | 06/30/1981 |
| 4266207 | Coaxial cable band-pass filter The band-pass filter coupling element of a coaxial cable is in the form of a laminent of dielectric material having a conductive layer on opposite faces. Each end face is metallurgically joined to an end face of a center conductor. A sleeve of dielectric ... | 05/05/1981 |
| 4245198 | High frequency filter device A filter device has two filters for filtering or separating two high-frequency signals having different frequencies. Each filter comprises a plurality of quarterwavelength coaxial resonators, cables for connecting the filters with terminals, and a casing ... | 01/13/1981 |
| 4223287 | Electrical filter employing transverse electromagnetic mode coaxial resonators An electrical filter comprising a cylindrical metal case having an aperture extending in a line, a plurality of 1/4 wave length transverse electromagnetic mode coaxial resonators inserted in the aperture of the metal case in an electrical series fashion, ... | 09/16/1980 |
| 4216448 | Microwave distributed-constant band-pass filter comprising projections adjacent on capacitively coupled resonator rods to open ends thereof A microwave distributed-constant filter of a band-pass characteristic having at least one attenuation pole comprises resonator rods, each of which has an open and a shorted end and of which two first are inductively coupled in series through at least one ... | 08/05/1980 |
| 4202594 | RF Connector assembly including mounting apparatus for a washer-like capacitor In an RF coaxial connector assembly, apparatus is provided for mounting a washer-like capacitor. The capacitor is used for providing DC and low frequency isolation between the outer conductor of the connector and the device to which the connector is attac... | 05/13/1980 |
| 4198613 | Filter contact A pin or socket type electrical contact of an efficient modular design selectively provides transient voltage overload protection, inductive and capacitive filter impedance for frequency discrimination, and series DC resistance and a fusing element for ap... | 04/15/1980 |
| 4184130 | Filter devices incorporating dielectric resonators and leakage cable A band rejection coaxial filter for use with a coaxial transmission line, for example, comprises a casing made of a conductive material and having an internal geometry selected to be in a cut off state with respect to the frequency of a signal being trans... | 01/15/1980 |
| 4161704 | Coaxial cable and method of making the same Circuit components such as frequency filters, impedance transformers, and time delay elements are fabricated into an assembly which is electrically and mechanically coupled to the center conductor. A seamless dielectric material is telescoped over the ass... | 07/17/1979 |
| 4151494 | Electrical filter The present invention is an electrical filter which includes coaxial resonators, for example, both-end open type 1/2 wave length TEM (transverse electro-magnetic mode) coaxial resonators, each having dielectric material, for example of titanium oxide grou... | 04/24/1979 |
| 4149170 | Multiport cable choke A unitary broadband high impedance isolation section for a plurality of cely spaced antennas as well as other electrical apparatus wherein the respective separate coaxial cables feeding the antennas and the shielded multi conductor cable for the other el... | 04/10/1979 |
| 4051449 | Time frequency diversity system A plurality of signals to be separated in time as well as in frequency are imultaneously applied to the input of a power amplifier whose output is applied to the input of a fast-tuned filter. The filter is capable of being almost-instantaneously tuned to a... | 09/27/1977 |
| 4050040 | Fast-tuned multiplexer-power combiner A multiple-frequency, coaxial filter and coupler has a cylindrical outer ing surrounding two or more axial sections of the cylinder separated by radial vanes. Each of these sections forms a separate coaxial filter with a separate input at one end and an ... | 09/20/1977 |
| 4004257 | Transmission line filter A transmission line filter having two conductors with insulation therebetween. A third conductor of a length related to the wavelength of the signal being filtered is spaced from one of the conductors but electrically coupled thereto. Terminal connectors ... | 01/18/1977 |
| 3980976 | Coaxial connector A coaxial connector for a coaxial conductor, such as an antenna feeder, which can isolate one device from another along the length of the conductor, such as an antenna from a television receiver for avoiding electric shock. The connector includes a disc-s... | 09/14/1976 |
| 3973204 | YIG tuned mixer A microwave mixer is integrated with an yttrium-iron-garnet (YIG) tuning element to provide a YIG tuned heterodyne conveter or mixer. An input signal is provided to the YIG tuning element by an input coupling loop and local oscillator power is provided to... | 08/03/1976 |
| 3936776 | Interspersed double winding helical resonator with connections to cavity In a helical resonator, sometimes called a coaxial resonator with helical inner conductor, new capabilities are achieved by providing a double winding with the turns interspersed and of like pitch. One pair of respective opposite ends of the two portions ... | 02/03/1976 |
