Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 6804322 | X-ray image converter, device and method for recording, processing and illustrating images using X-rays An X-ray image converter (2) for recording and evaluating information gained from X-ray investigations of persons (3), animals or objects is suggested, which comprises a carrier (4) of a material in which the impinging X-ray radiation causes det... | 10/12/2004 |
| 5686732 | X-ray apparatus comprising a photoconductor and a charging device An apparatus, including a photoconductor (1) for converting X-rays into a charge pattern, and a controllable charging device (3, 9) for charging the surface of the photoconductor to a defined potential. The service life of the charging device is prolonged... | 11/11/1997 |
| 5519750 | Method of forming X-ray images, and device for carrying out the method A method of and device for forming X-ray images in which a charge pattern corresponding to the X-ray intensity generated on the surface of a photoconductor is line-wise scanned by a number of probes which detect the charge in respective adjoining scanning... | 05/21/1996 |
| 5467378 | X-ray apparatus comprising a photoconductor and a corona charging device An X-ray apparatus, includes a photoconductor for convening X-rays into a charge pattern and a corona charging device for charging the surface of the photoconductor to a defined potential prior to an X-ray exposure. Deposits of dust on the corona charging... | 11/14/1995 |
| 5185772 | Radiation pickup device, and radiation imaging system and method for the same An imaging belt, a dielectric recording sheet, a charger, a transcript roller, and first and second rollers are arranged in a casing. A latent image corresponding to a radiation transmitted image is formed on the imaging belt. At least a fluorescent layer... | 02/09/1993 |
| 5163075 | Contrast enhancement of electrographic imaging The contrast of an electrographic image or a region of interest of an electrographic image having low contrast is enhanced by developing the electrographic image with toner using a development electrode which is biased to a potential which has a value nea... | 11/10/1992 |
| 5105451 | Electrographic process utilizing fluorescent toner and filtered detector for generating an electrical image signal An electrical image signal is produced by an electrographic process including the steps of forming a differential voltage pattern; developing the voltage pattern with a luminescent toner; exciting the developed image to emit radiation; and photoelectrical... | 04/14/1992 |
| 5097493 | Device for scanning an X-ray image A plurality of electrometer probes scan the charge pattern of a photoconductor (1), the distance between the electrometer probes (6) and the photoconductor (1) being measured via an alternating voltage applied to the photoconductor (1). The alternating vo... | 03/17/1992 |
| 5093851 | Device for producing X-ray pictures A photoconductor for converting incident X-ray radiation into a charge pattern is on carrier constructed so as to be rotationally symmetrical with respect to an axis of rotation. A driving unit rotates the carrier and photoconductor about the axis of rota... | 03/03/1992 |
| 4975935 | Method of producing an X-ray exposure by means of a photoconductor and arrangement for carrying out the method The invention relates to a method of producing an X-ray exposure is provided by a photoconductor, which converts X-radiation into a charge pattern, is evenly charged locally before the X-ray exposure, is discharged by the exposure as a function of the int... | 12/04/1990 |
| 4939759 | Method of producing an X-ray image by means of a photoconductor, and device for performing the method A method is disclosed for producing a X-ray image by a photoconductor which converts X-rays into a charge pattern and which is uniformly charged prior to the X-ray exposure and is discharged during the X-ray exposure as a function of the intensity of the ... | 07/03/1990 |
| 4752944 | Method and apparatus for producing an X-ray image by means of a photoconductor A method and apparatus for producing an X-ray exposure by means of a photoconductor. Photoconductor defect locations which appear as artefacts in the X-ray image are eliminated by subtracting a compensated dark discharge image from the X-ray image.... | 06/21/1988 |
| 4482619 | X-Ray electro-photographic recording material and method for generating an electrical charge image in such material An x-ray electro-photographic recording material is formed of a photo-conductive layer (1) comprised of a selenium-arsenic alloy and positioned on a transparent electrode layer (4), which is positioned on a further layer (3) comprised of an x-ray luminoph... | 11/13/1984 |
| 4446365 | Electrostatic imaging method A method of operating a photodetector system. The method impresses a surface charge on a photon detector by establishing an electric potential across the detector, storing the detector in the dark, disconnecting the source of electric potential, and elect... | 05/01/1984 |
| 4352185 | Gas laser having improved stability against environmental conditions The laser is an internal mirror hermetically sealed design, utilizing an envelope made principally of glass. The effects of thermally produced distortion on mirror alignment are minimized by providing a thermally and electrically conductive liner in close... | 09/28/1982 |
| 4218619 | Multi-copy ion-valve radiography A method and apparatus for ion-valve radiography allowing a multiplicity of copies to be made responsive to a single radiographic exposure. Radiation, differentially-absorbed by passage through an object to be studied, enters an exposure chamber having a ... | 08/19/1980 |
| 4206351 | Electroradiographic apparatus Dielectric receptor sheets which are transported seriatim from a tray into the gas-filled interelectrode gap of an ionography imaging chamber are arrested ahead of the chamber, and a corona generating device is moved along each arrested sheet to apply a u... | 06/03/1980 |
| 4204731 | Apparatus for electrophotographic copying with means for effecting image penetration through the copy carriers An electrostatic charge is applied to a charge carrier and the latter is thereupon contacted with one side of a sheet-material copy carrier. Thereafter, an original is imaged onto the charge carrier to produce thereon a latent electrostatic image field wh... | 05/27/1980 |
| 4204118 | Apparatus for producing X-ray images by electrical charges This invention relates to novel electronic devices for producing images such as of X-rays by means of electrical charges. The image the examined body or object is converted in a novel vacuum tube into a beam of electrons having the pattern of radiation im... | 05/20/1980 |
| 4187424 | Radioelectrophotography process A process for radioelectrophotography, which comprises imparting a uniform electrostatic charge to the surface of a recording layer of an image-recording material and containing dispersed therein many cells and/or pores to cause a strong electric charge t... | 02/05/1980 |
| 4142100 | Process and apparatus for recording and optically reproducing X-ray images A method is disclosed for recording and optically reproducing X-ray images on recording material in an ionization chamber which is filled with a gas which can be ionized by X-rays. The gas within the chamber is subjected to a high voltage by means of elec... | 02/27/1979 |
| 4134137 | Single wire microelectrometer imaging system A single wire microelectrometer imaging system is disclosed wherein a latent electrostatic image charge pattern is produced, then measured from point to point across the charged image surface and then transmitted for processing if desired. It is found tha... | 01/09/1979 |
| 4132893 | Method and apparatus for recording and optically reproducing X-ray images Disclosed are a method for serially recording and optically reproducing X-ray images on a recording material and an apparatus for carrying out the method. The method comprises the steps of disposing the recording material in an ionization chamber filled w... | 01/02/1979 |
| 4129779 | Photocontrolled ion-flow electron radiography apparatus with multi-layered mesh structure Photocontrolled ion-flow electron radiography apparatus has a multi-layered mesh structure, comprised of a conductive apertured sheet supporting an insulating layer, overlayed with a conductive screen and a top-most layer of photoconductive material, to c... | 12/12/1978 |
| 4126788 | Photoreceptor plate cassette for use in automated X-ray image processing systems An improved cassette for containing a photoreceptor plate adapted for use in an automated X-ray image processing system including a window member formed of a highly X-ray transparent material, an electrode for minimizing image smear affixed to the inside ... | 11/21/1978 |
| 4121101 | Method of recording radiographic images In Reiss chamber method or ionography, or in a method of modification or combination of these methods wherein an electrostatic latent image of an object irradiated with radiations such as X-rays is formed on an insulating image recording layer, a photocon... | 10/17/1978 |
| 4064439 | Photocontrolled ion-flow electron radiography A method and apparatus for photocontrolled ion-flow electron radiography utilizes a selectably movable phosphor plaque for controlling the selective discharge of a precharged photoconductive layer responsive to differential x-ray absorption in an object t... | 12/20/1977 |
| 4061915 | Method and apparatus for making X-ray images Sheet-like dielectric receptors which are to be exposed to object-modulated X-rays in the interelectrode gap of an ionography imaging chamber are attached to sheet-like carriers so that the carriers extend laterally beyond the reactors. The carriers are t... | 12/06/1977 |
| 4039831 | Two color xeroradiography development A xeroradiographic system employing both fringe field and absolute development in order to provide both enhancement of sharply changing boundaries as well as imaging slowly changing borders is provided. This is accomplished by first developing the image w... | 08/02/1977 |
| 4038943 | Signal amplification by charging and illuminating a partially developed latent electrostatic image Method and apparatus for reducing X-ray dosage required for xeroradiographic examinations without reducing the relative information capacity of the images produced during the examination. In particular, a charged xerographic plate is positioned adjacent t... | 08/02/1977 |
| 4030922 | Image recording method An image recording method for imagewise modulated radiation comprising: forming electric latent images of a radiation image on two or more recording surfaces and then forming an edge enhanced first image and a second image non-edge enhanced or edge enhanc... | 06/21/1977 |
| 4029960 | Device for the recording and reproduction of X-ray pictures A device for the recording and reproduction of X-ray pictures utilizing a layer of amorphous selenium which is disposed in a housing, the selenium being carried by a thermoplastic layer, preferably having a further dielectric reflective layer interposed b... | 06/14/1977 |
| 4027158 | Electrophotographic apparatus comprising pre-development charge reducing means A process and apparatus for the developing of electrophotographic exposures and, more particularly, a process and apparatus for electrophotographic image reproductions. The electrophotographic image-reproducing process and apparatus includes exposing an e... | 05/31/1977 |
| 4019052 | Electrophotographic x-ray device An electrophotographic diffractometer apparatus, comprising a photoconductive storage member, means for uniformly charging said storage member, means for holding a diffraction specimen, means for directing a collimated beam of electromagnetic radiation to... | 04/19/1977 |
| 4002906 | Apparatus and method for the recording and reproduction of X-ray pictures X-ray pictures are recorded and reproduced through techniques in which a housing, which contains a recording medium sensitive to X-rays is provided with an inlet window for the X-rays which consists of an electrode transparent for optical radiation. The h... | 01/11/1977 |
